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"Roger, roger."

- Typical response of a B1 battle droid

B1 battle droids, also referred to as standard battle droids, were the most widely used battle droids manufactured by Baktoid Combat Automata and Baktoid Armor Workshop, and were the successor to the OOM-series battle droids. Even though they were widely produced and deployed, the B1 battle droid was flimsily designed and easy to destroy, and was only truly successful in large numbers. Early versions of the model also required the use of a Central Control Computer, but despite these weaknesses they saw extensive service as the mainlines soldier of the Trade Federation's mechanized droid army. The droid army was deployed during the Invasion of Naboo, and after landing B1 battle droids marched into the Naboo capital of Theed, and using the massive army the Trade Federation captured the city. The droids continued to keep the Trade Federation's grip on the planet throughout the occupation, and the majority of Federation droid troops were deployed to combat the Gungan Grand Army at the Great Grass Plains. In the ensuing battle many militiagungs were killed, but the entire droid army was defeated because it shut down when the control computer was destroyed with the Federation’s Droid Control Ship by the young Force-sensitive pilot, Anakin Skywalker during the portion of the battle that was in space.

During the Separatist Crisis, the Trade Federation leadership met with other commerce guilds on the planet Geonosis, and the Federation had given its droid army, including the B1 battle droid, to the growing Confederacy of Independent Systems. The droids became the main soldier of the new Separatist Droid Army. The forces of the army used newer reworked B1s. These newer B1 battle droids did not have the reliance on a central command signal and were capable of independent thought; however, it was limited. On Geonosis the droid army clashed with the Galactic Republic's new army of clone troopers for the first time. This battle launched the galactic conflict known as the Clone Wars. The B1 battle droids and the other models of combat droids used by the Confederacy fought the forces of the Republic on countless worlds for the duration of the three-year-long conflict.

Throughout the droids' history, it was evident that the B1 was dim-witted. Programming glitches manifested as the B1 battle droids developing personality quirks, and they were known to make commentary on what occurred around them. The B1s were outmatched by the clone troopers of the Republic, but massive numbers of B1s could gain victory over the more experienced clone troopers, and even members of the Jedi Order. The B1 battle droids, nicknamed "clankers" along with other Separatist droids by the Republic, were manufactured in countless numbers for the Separatists, but military officers, like the Supreme Commander of the Droid Army General Grievous, grew angry at the failings of the B1. Following the defeat of the Confederacy, B1 battle droids were deactivated by the Galactic Empire along with the rest of the droid army. Despite this, and battle droids becoming outlawed under the Empire, B1 battle droids continued to see use through Separatist holdouts and the black market during the Imperial Era.

Design
"Look, it's RB-551.''" "No wonder he got blasted. He's one of those older models programmed by a central computer." "Not us, we're independent thinkers." "Roger Roger." "''Roger Roger."

- Several B1s discussing how they were upgraded models from the older RB-551

B1 battle droids were humanoid fourth class battle droids measuring 1.93 meters, or 6 feet and 4 inches, tall. Designed by the Geonosians for the Trade Federation, the B1s possessed a skeletal shape, which made them resemble animated skeletons, and the B1s had been designed to resemble their Geonosian creators. B1 battle droids were the successors to similar looking the OOM-series battle droid. These droids could preform more functions when compared to a B1, due to the level of independent reasoning in their programming, but the B1 battle became the main soldier of the Trade Federation Droid Army.

B1 battle droids could be controlled by a centralized and networked command center /mainframe, or B1s could be programmed for independent action. However, B1 battle droids originally required the connection to a command mainframe, the Central Control Computer. These computers were located in an orbiting Droid Control Ship, which transmitted computer-automated commands and orders from Trade Federation leadership. B1s themselves were incapable of independent thinking, and all B1 battle droids obeyed the central command signal transmitted by the control ship. The B1 forces of the Trade Federation needed this signal to operate. Central Control Computers were used because the budget-minded Trade Federation saved the production costs of thousands of individual droid brains, and the control battleships that the computers were housed in would track the movement of all battle droids. To receive signals from the control ship, the comlink booster packs worn by B1 battle droids had command ship signal receivers, and, instead of a droid brain, the beaked head of each B1 contained a receiver for their orders from the control ship. B1s themselves possessed small processors that would collect limited sensory data and movement to transmit back to the Droid Control Ship. Contained within the head of a B1 were the signal transmission lines, the dephasing anticode sieve, the signal receiver, the override signal receptor, and the signal confirmation module, and B1's skull contained a servomotor, a device used for movement in droids and cybernetics, but exposure to moisture could corrode the motors. The B1's head also held the unit's simple vocabulator, and this was what allowed the droid to speak. The voices of B1s ranged from a rather robotic sounding voice, to a high-pitched voice, to a lower and more monotone voice.

While the use of Central Control Computer could save on costs, the B1's need for a central command signal to operate provided to be shortsighted. Every B1 battle droid would switch off and enter a stand by hibernation mode once a Droid Control Ship was destroyed. The Battle of Naboo showcased the faults of using a control computer as every Federation droid shut down as a result of the control ship's destruction. By the time B1s were being used by the Confederacy of Independent Systems, the newer models of B1 battle droid did not require a central command signal to operate. Autonomous thinking was introduced to battle droids by the Geonosians, and Confederate leadership found the older model's networked control centers to be too large of a vulnerability. The older B1s were largely replaced, and the newer models were capable of prolonged independent action and limited independent thought. No longer needing a control ship to operate or to program them, the newer B1s saw themselves as "independent thinkers" and saw themselves to be above their predecessors. However, within the Separatist Droid Army, some older B1 models were still used. An example was RB-551, a B1 battle droid who served as part as a droid patrol during the Battle of Ryloth, but the older B1s had still been largely phased out. Central Control Computers still remained in use because of the battle droids that required them, as was on the Subjugator-class heavy cruiser, Malevolence. These units were given commands from the computer to preform complicated technical duties.

A droid possessing a humanoid design allowed them a degree of versatility, and the B1 battle droids showcased this. Their humanoid physiques of the B1 model has been specifically commissioned by the Trade Federation for practical reasons. The humanoid form allowed B1s to operate existing machinery, vehicles, and weapons originally designed for organic operators and pilots, saving the Federation unnecessary production costs and retrofitting. B1s could pilot Single Trooper Aerial Platforms, Armored Assault Tanks, Multi-Troop Transports, and Federation battleships, among other vessels. B1 battle droids' limited programming meant they were not always effective at these types of jobs, however. During the Mission to Rugosa, a B1 battle droid at the controls of the laser cannons on a Munificent-class star frigate missed every shot it fired at Republic escape pods. When the B1 battle droid was confronted about this by the OOM command battle droid in command of the frigate, the droid told the commanding officer that it had missed due to flawed programming it suffered. The limited programming of the B1 battle droids also made them unfit to serve many of the jobs they were tasked with on the advanced Subjugator-class heavy cruiser Malevolence, during the Malevolence campaign.

Pistons on the B1 battle droid functioned like they were muscles, and the droids possessed balance stabilizers, which droids could supposedly quake in, and knobby exposed motorized joints. The body of the B1 battle droid was also designed so the unit could be able to fold into a compact stowed configuration for transport in Multi-Troop Transports. In this configuration one hundred and twelve B1 battle droids could be stored into the troop transport, and B1 battle droids could also fold into this configuration when they were low on power and needed to close down to recharge. When B1s were activated, it took seconds for them to deploy. Their limbs deployed first from being folded, resulting in the droid standing up, and their long neck was the last part to unfold. While B1s did not always possess a blaster when folded, after their neck was unfolded the droids could reach to their backs to claim E-5 blaster rifles.

and were able to be produced cheaply. The cheap price tag of the B1s often allowed multiple battalions of B1 battle droids to be sacrificed for a victory without concern.

B1 battle droids had a comlink just below their head, and their photoreceptors could switch to an infrared mode. B1 battle droids had the ability to pick up electromagnetic fields, such as the small fields generated from holoprojectors.

B1 battle droids could exhibit various tones of voice, such as fear, confusion, and excitement. These also were examples of the B1 battle droid's "personality quirks," which were the result of programming glitches in the B1 battle droids.

While an inexpensive yet durable metal protected the droid's signal-receiver assembly, this metal did not protect B1 battle droids against blaster fire or lightsabers well, and these weapons could easily defeat a B1. Another weak point in the B1 was the droid's capacitors, and, as shown by enemy snipers, hitting between the capacitors could take out the unit. However, while tactics like these could defeat a B1, Clone Captain "Rex" informed the Onderon rebels that the only true way to kill a battle droid was to aim for their head, and Rex stated this was because the droids didn't even require their bodies to report intel back to central command. Later in the Clone Wars, Separatist Duke Solha, as well as his brother and sister, operated a droid factory on Mokivj that created B1 battle droids, as well as B2 super battle droids, made from cortosis. The cortosis was from a nearby mine, and this metal made the droids more resistant to blaster bolts and lightsabers. This factory was ultimately destroyed in the Mokivj catastrophe.

Performance
The B1 was designed to be easily controlled, inexpensive to mass-produce, and unquestioningly obedient, but despite this being their design there were instances where B1s would questions their orders, and/or would comment on them. An example was during the Battle of Quell, in which T-series tactical droid TF-1726 gave the order to destroy Republic Jedi General Aayla Secura's Venator-class Star Destroyer. A B1 battle droid disagreed with this, and questioned the order as it brought up that there still hundreds of droids on board the cruiser. These droids had been sent to attack the Republic Star Destroyer earlier in the battle, but TF-1726 responded that he didn't care, and ignored the B1's protest, so the B1 followed its orders to fire on the enemy ship. Another example of this was when a B1 questioned the hired bounty hunter Cad Bane's decision not to launch reinforcements to the vulture droids engaging Republic forces during the Battle of Devaron. Later during the battle, two B1s were concerned over their orders to defend the ship's bridge. The droids knew only the few droids stationed on the bridge would be defending against two incoming Jedi. During a sandstorm in the final acts of the Second Battle of Geonosis, O.M.5 and another B1 battle droid questioned where Separatist Council member Poggle the Lesser was leading them, but the pair continued to follow him for as long as they could.

These examples of B1s questioning and commenting on their orders  all additionally served as examples of the "banter" and other comments that the B1 battle droids would often make.

Other examples were when two B1 battle droids spoke on the battlesphere they were stationed on, Skytop Station, as one needed to get its head adjusted due to high amounts of moisture.

Another example came when a group of B1 battle droids talked about how they believed they were superior models to the older RB-551. B1 battle droids also made other types of comments on duty, such as one B1 battle droid commenting on the beauty of the planet Hissrich, and another insulting Republic clone troopers during the Battle of Teth, calling the clones of Torrent Company "Republic dogs." One B1 battle droid seemingly saw itself as being above the astromech droids of D-Squad, as it called them "stupid astromechs." These "personality quirks" displayed by B1 battle droids were the result of programming glitches the droids suffered. B1 battle droids proved to be dim-witted, but no attempt was made to fix these issues, as the droids were still able to use their swarm tactics, and advanced programming was not required for this.

Tactics and countertactics
"Droids were a bit dim. More so than I imagined.''" "They make up for it in numbers. They're designed to overwhelm." "''But they're not designed to deal with our approach."

- Saw Gerrera, Ahsoka Tano, and Anakin Skywalker

Individual B1 battle droids were not effective soldiers against enemies like clone troopers in combat, so the B1 primarily relied on mass-assault tactics to achieve victory. The cheap cost of the B1 battle droid made this a viable tactic for military use. Although later models were capable of limited independent thought, B1 battle droids had a limited intelligence compared to other soldiers and required a superior commander to lead them effectively in battle. Motion-capture data from highly trained organic soldiers allowed the B1 to demonstrate an array of combat stances, positions, and maneuvers. Despite their advantages, B1s were just as vulnerable to EMP weapons as other droids. The Gungan Grand Army used this tactic during the Battle of Naboo when they used boomas against the Trade Federation Droid Army, and, during the Clone Wars, the Republic also used this advantage. Clone troopers used Electro Magnetic Pulse grenades, which were nicknamed "droid poppers" by the clones, against B1s and other battle droids, and the Republic would develop the electro-proton bomb, which could short-circuit an entire droid army.

In the field, B1 droids often utilized E-5 blaster rifles and wore comlink booster packs. The droids were also able to use electrobinoculars and thermal detonators on the field. During the Battle of Ryloth, two B1s in Nabat used electropoles to force Gutkurrs to move to attack Ghost Company. B1 battle droids were programmed to never surrender, but B1 was also able to focus on self-preservation, and they could attempt to escape their possible destruction instead of remaining in a fight. B1 battle droids were above the astromech droids used by the Confederacy, and B1s were able to hold military ranks such as sergeant and lieutenant. B1 battle droids could also serve as scouts and as gunners to operate heavy artillery, such as the laser cannons on Armored Assault Tanks. B1 battle droids were able to operate in space.

Origin
"Some of you gathered here today are old enough to remember when Baktoid Armor Workshop came to Geonosis and struck a deal with us to build foundries and produce battle droids and other automata for which we were handsomely rewarded."

- Archduke Poggle the Lesser to the Geonosians

In the early days of the B1 battle droid, the model would see use due to the wealthy interplanetary corporate organization known as the Trade Federation. Even though the galaxy was ostensibly in a time of peace, the Trade Federation was allowed to use a private automated defense force to keep its forces safe from pirates and to protect the valuable shipments of the corporation. The defense force would be made up of battle droids due to the Trade Federation leaders not trusting forces it could not control, and it was the B1 battle droid that would come to be the main soldier of this army.

B1 battle droids would be manufactured by Baktoid Combat Automata and Baktoid Armor Workshop, a member firm of the Techno Union, and this company would approach the Geonosians the qausi-insectoid species of the planet Geonosis, to design droid foundries for the Trade Federation. The Geonosians would be rewarded for their deal to built battle droids and other weapons, and, while Archduke Poggle the Lesser once later claimed they did not know they were working for a trade cartel, the Geonosians were the ones who designed the B1 battle droid for the Trade Federation. The work for the Federation kept the Geonosians content and busy, which kept the species out of disorder, and they designed the B1 battle droid to be in their own image. The Trade Federation had also commissioned for the B1 to have humanoid physiques, so that that way the units could operate pre-existing machinery, vehicles, and weapons.

Baktoid Combat Automata was contracted to produce the B1s, within these foundries-turned-factories on Geonosis, and the B1s were quick to assemble and cheap to produce. On Geonosis, Poggle the Lesser, who was also backed by the shadowy Trade Federation benefactor, Darth Sidious, would have millions of B1 battle droids manufactured for the Trade Federation. However, due to the colossal cost that each B1 receiving a droid brain would be, the Trade Federation chose to have forces of B1 battle droids be controlled simultaneously by Central Control Computers. Orson Callan Krennic would later state that the computers were an outgrowth of Neimoidian society's hierarchical structure.

Prior to the construction of the army of B1 battle droids, the Trade Federation used small numbers of the B1's predecessor, the OOM-series battle droid, on the starships of the Federation fleet. While the OOM-series could preform more functions than the B1s, B1 battle droids became the main infantry force of the Trade Federation's army. However, OOM-series units did continue to see use, and OOM-series battle droids could even be deployed alongside their B1 successors.

Initially, the B1 was merely used to protect transports, a role that fell in line the allowed role of the defense force being used a protection, and&mdash;despite their coming role in the plan of the Sith &mdash;the design of the B1 was not truly meant for warfare. However, this fact would be ignored, and the B1s were given a role as the front line soldiers for a Federation which could easily target planets that lacked a military force. For the planets that did have a military, most worlds used one for ceremonial purposes or internal security, and, with the Republic only possessing the Jedi Order to keep security, the droid army of the Trade Federation would come bring it closer to galactic supremacy. The true power of the Federation's "defense" force was also not known to most in the Galactic Senate, while others were paid to look the other way. However, Republic leaders would be alerted to the new status quo because of the first deployment of the battle droids, the Invasion of Naboo.

Invasion of Naboo
"Finally the mackineeks gottin us surround, but mesa and the rest, we just looked at each other smiling. We was going to rush them. We didn't care about their flashers. We just had a feeling that we'd like seeing what we could be doing. And that's when the mackineeks switched off."

- The Gungan militiagung Oma Prumba's account on the end of the Battle of Naboo

In 32 BBY, Prop 31-814D made Free Trade Zones eligible for taxation, and in retaliation the Trade Federation initiated a blockade of the planet Naboo. The Jedi Obi-Wan Kenobi and Qui-Gon Jinn were sent to negotiate with the Federation, but the negotiations were thwarted when Darth Sidious contacted Neimoidian Viceroy Nute Gunray and ordered him to kill the Jedi. Although the two Jedi were able to escape, the Trade Federation sent an invasion force to Naboo in hopes of forcing Queen Padmé Amidala to sign a treaty which would legitimize the occupation. At the end of the occupation B1s fought against the Gungan Grand Army at the Great Grass Plains during the Battle of Naboo, and did gain the upper hand. This was truly a distraction to draw the main droid forces away from Naboo’s capital city of Theed, which had been occupied since its capture by the Federation. In Theed they fought against the Royal Naboo Security Forces under the command of the Queen of Naboo, Padmé Amidala. The droids were ultimately shut down at the end of the occupation during the Battle of Naboo when the Trade Federation's orbiting Droid Control Ship was destroyed by the young Force-sensitive pilot Anakin Skywalker.

After the Invasion of Naboo
"For some time I've wanted to congratulate you for introducing autonomous thinking to the battle droids. Central control computers were certainly an outgrowth of the hierarchical structure of Neimoidian society. And we all saw what happened at the Battle of Naboo. The Separatist droid army has come a long way since, and I don't think the Geonosians are given enough credit for that."

- Lieutenant Commander Orson Krenic claims to wish to congratulate the Geonosians to Archduke Poggle the Lesser

The Trade Federation had ultimately lost thousands of B1 battle droids due to the Battle of Naboo, and the defeat showed the faults of the B1. It was clear that the B1 could effectively bully civilians, but the droid was not a match for trained soldiers. The lessons learned from Naboo lead the Techno Union to develop the B2 super battle droid. Super battle droids were a heavy infantry model of droid designed solely for combat, but also would also see other uses. The Trade Federation would come to ally itself with the growing Confederacy of Independent Systems. By the Clone Wars, Separatist leaders had come to see networked control centers for B1s as a vulnerability, and the reliance on a central command signal, the tactic that had cost the Federation the Battle of Naboo, eventually was removed from the B1 battle droids. The new model of B1 that did not need a control ship to operate were capable of limited independent thought, and the newer B1s regarded themselves as "independent thinkers." Older models controlled by central computers still saw use, despite the newer model of B1, and the computers were used to give commands to droids performing complicated technical duties.

The Separatist Crisis and the Battle of Geonosis
In 22 BBY, ten years after the Battle of Naboo, the Federation provided B1 battle droid forces to the Confederacy of Independent Systems, a secessionist movement composed of wealthy industrialists and disgruntled citizens of the Outer Systems, and the Confederacy's Droid Army. The Separatist Crisis soon broke into full war at the Battle of Geonosis, and the Separatists officially waged war against the Galactic Republic and its newly released clone army in a conflict known as the Clone Wars.

The Clone Wars spread
"You expect victory over Jedi, but all you give me to fight them is battle droids!"

- General Grievous to Count Dooku

Dominating the Separatist Droid Army's ranks as its main infantry soldier, the B1 battle would see use for the entirety of the Clone Wars.

and there were often one hundred B1 battle droids on a battlefield for every one B2 super battle droid. However, despite their numbers, they were not as effective as the experienced clone troopers of the Republic. During the war, many Separatist leaders grew angry at the failures of the B1, particularly the Supreme Commander of the Droid Army, General Grievous. B1 battle droids were used throughout the entire conflict,

and when not used on the front lines this model of droid could be as security on Separatist worlds and military locations like ships and bases. In addition to their use against the Republic in the war, the B1 battle droids also saw action against other enemies of the Confederacy. These were enemies like the Nightsisters at the Battle of Dathomir and Darth Maul's Shadow Collective during the Confederacy's campaign against the group.

Age of the Empire
"Send a message to the ships of the Trade Federation. All droid units must shut down immediately."

- Darth Sidious to Darth Vader

Battle droids were outlawed by the Galactic Empire, the totalitarian state that replaced the Republic, in the wake of the destructive conflict in 19 BBY. Orders were given to stormtroopers to shoot and destroy "clankers" on sight. By the time of the early rebellion against the Galactic Empire, the super tactical droid General Kalani continued to command some remaining battle droids and droidekas at a wrecked Separatist supply ship on Agamar. These droids had not been given the shut-down code issued years prior, as Kalani had believed it was a Republic trick. After the rebel group known as the Spectres&mdash;joined by Rex&mdash;made contact with the Separatist remnant, the two forces joined to fight off an Imperial attack. With the aid of two Jedi, Kalani and several of his B1 battle droids were able to escape the planet in a Sheathipede-class transport shuttle. Due to this mission, Kalani and Rex came to an unofficial end to the Clone Wars, which they both accepted as the war's end.

During the Galactic Civil War, several B1 battle droids were among the rebuilt battle droids in the workshop owned by Ruen on the Wreck Belt. Ruen notably did not treat his droids well, but kept them controlled through control loops and ethical programming he installed into them. Ruen activated many of his battle droids, including B1 battle droids and B2 super battle droids, to apprehend the assassin droids 0-0-0 and BT-1 while the two were there for business. BT-1 quickly destroyed all of the droids Ruen had activated, and Ruen was forced to help the two assassin droids. After this was done however, BT-1 was able to hack into the remaining droids and remove the restraints Ruen had placed, which 0-0-0 viewed as an act of emancipation. Ruen tried to contact Quarantine World III to report about 0-0-0, but the remaining now-freed B1s and other battle droids turned on him. The droids killed Ruen and destroyed the workshop as BT-1 and 0-0-0 watched from a distance. As the two left the Wreck Belt they discussed how they believed that if organics treated droids better, violence between droids and organics wouldn't be necessary.

Legacy
"A battle droid? You wanted to show us&hellip; a battle droid? The most incompetent droid soldier in the history of both the Republic and Empire. A mechanical comedy of errors. And you believe that Surat Nuat wants a meager, worthless B1 droid?"

- Makarial Gravin, to Temmin Wexley upon seeing the B1 battle droid Mister Bones

The wide-scale use of droids in combat led to an increase in anti-droid propaganda and rhetoric following the Clone Wars. When several thugs saw the modified battle droid Mister Bones deployed by Temmin Wexley on Akiva against them during the time in the last months of the Galactic Civil War they laughed at the droid due to the model's history of failures. However this droid was modified, and proved to be very effective.

Notable individuals
"I PERFORMED VIOLENCE. ROGER-ROGER."

- Mister Bones, to Temmin Wexley

Some notable B1 battle droids included the OOM command battle droid OOM-9. During the Galactic Civil War, the modified battle droid Mister Bones served as a companion to Temmin Wexley. Following the Rebellion on Akiva, Bones along with Temmin joined the New Republic. Another notable B1 battle droid was R0-GR, a veteran of the Clone Wars who later served the Freemaker family.

Specialized B1 battle droids
Fighting in uniformity, the B1 was only distinguished by numerical markings on the back of their comlink booster packs. Command structure and function was designated by distinct, colored markings on their armor, but these markings were for OOM-series battle droids and not B1s. Blue denoted pilot droids, red denoted security droids, and yellow denoted command droids.


 * B1-series rocket battle droid&mdash;Standard B1 droids that were specifically modified to hunt down escape pods in space. They donned rocket packs and were distinguished by their orange and black colored bodies.
 * B1 grapple droid&mdash;A B1 variant that were specialized in hand-to-hand combat and had white and green plating.
 * B1 recon droid&mdash;A variant of the B1 that was specifically designed and used for reconnaissance.
 * B1 repeater blaster droid&mdash;A B1 variant that utilized a repeating blaster. The droid had the same markings as the standard B1 battle droid.
 * B1 rocket launcher droid&mdash;A variant of the B1 that used a missile launcher, and this variant had the same markings as the standard B1 battle droid.
 * Droid worker&mdash;Modified B1 battle droids that were created by and served Karina.
 * Firefighter battle droid&mdash;battle droids tasked to suppress and extinguish fires. Firefighter droids were positioned aboard the Malevolence during the Republic's assault on the vessel. Their bodies were mostly colored black with yellow stripes, and a single red spot could be found on their heads.
 * Heavy battle droid&mdash;battle droids designed to support heavy fire in battle. Armed with repeating blasters, these battle droids were capable of wielding heavy weaponry such as Z-6 rotary blaster cannons. They were identifiable by the overall gray body and dark red paintings.

Behind the scenes
B1 battle droids first appeared in the 1999 film Star Wars: Episode I The Phantom Menace.

In the mid-1990s, Doug Chiang's earliest designs of the battle droids were a nod to the helmets worn by the stormtroopers of the original trilogy. The finished droid's proportions are reminiscent of African sculpture. Early design had towering droids twice the height of humans, but subsequent iterations brought their height down to human size.