Throughout his Gallic campaigns, Caesar recruited Legions from his provinces of Cisalpine Gaul and Illyricum, and later Transalpine Gaul. His original appointment gave him command of four Legions, the VII, VIII, IX, and X. With the migration en masse of the Helvetii however, Caesar played for time through delegations with them whilst illegally raising additional troops, which would eventually become the XI and XII Legions. Normally the formation of new Legions required the permission of the Senate, but Caesar ignored such conventions again and again throughout his campaigns in Gaul, safe from prosecution due to imperium from his Proconsulship.
