Battle of Bryx

The Battle of Bryx to place on Bryx between Governor Carigan and the Galactic Empire. Carigan had purchased several Leviathan carriers and owned hundreds of hidden grounded anti-aircraft guns as well as many other types of hi-tech weapons.

Orbital siege
First the Imperials attempted an orbital siege to attack the Leviathan carriers whenever they sirfaced. However, whenever Imperial ships descended upon a Leviathan, they came under heavy fire from the hidden anti-air batteries. Moreover Carigan's fighters would stay within range of the ground batteries, thus gaining substantial supporting fire whilst attacking the Imperials. Imperials that attempted to pursuit Carigan's fighters back into the atmosphere were typically shot down.

Planetary bombardement
The Imperial commander pulled back into an objective orbit over the capital of Bryx, which allowed Carigan to receive supplies from the other side of the planet. Any attempt to stop his transport ships were thwarted by his fighters. He also purchased further armaments.

Having learned of Carigan's reinforcements, the Imperial commander decided that only a quick attack would lead the Imperials to victory. And so, he decided to bombard the capital and many of the planetary guns whose locations were known.

Invasion
After the bombardement, a planetary invasion was commenced, using thousands of dropships. However, Carigan had avoided using many of his ground guns during the entire conflict, and their locations had remain unknown, until he started firing them at the Imperial dropships. It was estimated that atleast 25000 stormtroopers perished in the hail of blaster bolts, before they even set foot on the surface of Bryx.

Eventually, the Empire managed to land enough troops to engage in ground combat, but even then, they were disadvantaged, as Bryx' troops knew the combat ground much better and had the support of the population. The Imperials managed to secure the major urban centers, but there was still resistance from mane of the Leviathans. Leviathans continued to offer resistance three years after the Imperial conquest of Bryx till the last one was destroyed due to a faulty in its oxigen tank.

Legacy
The Battle of Bryx is often used in Imperial academies as a textbook example, along with the Battle of Hoth and the Battle of Gorbah, of how things can go wrong during planetary assaults.