Following the Clone Wars' commencement, clone trooper battalions boarded Acclamator-class assault ships.
A battalion represented a substantial ground troop military formation. During the Clone Wars, both the Galactic Republic's Grand Army and the Confederacy of Independent Systems' armies employed battalions of soldiers. The Confederacy incorporated DSD1 dwarf spider droids within their droid battalions. A Republic regiment was structured from four battalions, and each of these battalions comprised four companies. Within the Stormtrooper Corps, a battalion was composed of four companies, totaling 800 stormtroopers. Four Imperial battalions formed a regiment. A major might command battalions.
The Imperial Army also utilized heavy battalions, which incorporated armored cavalry assets such as All Terrain Armored Transports, Imperial Troop Transports, and All Terrain Defense Pods. Grand Admiral Thrawn's Imperial armored division included heavy battalions, which were part of the Battle of Atollon. The Alliance to Restore the Republic included maintenance battalions in its military structure. These units welcomed wandering mechanics. The Alliance also employed standard infantry battalions.
The term could also apply to starfighter engagements. A battalion of RZ-2 A-wing interceptors under Sef Con's command participated in a battle at Substation Grimdock during 7 ABY. Furthermore, the First Order deployed a TIE fighter battalion against the Resistance during a skirmish over D'Qar.