Legion

"It was I who allowed the Alliance to know the location of the shield generator. It is quite safe from your pitiful little band. An entire legion of my best troops awaits them."

- Darth Sidious to Luke Skywalker

A legion was a ground infantry unit within an army. The 501st Legion was one such unit within the Grand Army of the Republic during the Clone Wars. In the Stormtrooper Corps, a legion consisted of four regiments, giving one a total of twelve-thousand eight-hundred stormtroopers. Galactic Emperor Sheev Palpatine deployed an entire legion of his best troops on the forest moon of Endor to protect the second Death Star's shield generator. This legion battled Rebel Alliance forces and native Ewok warriors during the Battle of Endor. The First Order split their stormtroopers into legions of 8,000 troopers. There was one full legion on the Finalizer, and there were 2.75 legions on the Fulminatrix, and there were somewhere around 125 to 200 legions on the Supremacy.