By the time of Julius Caesar in 54 BC, regular legionary units were supplemented by "exploratores", a body of scouts, and "speculatores", spies who infiltrated enemy camps. Due to the demands of the civil war, the extraordinary measure of recruiting legions from non-citizens was taken by Caesar in Transalpine Gaul (Latin: "Gallia Transalpina"), by Brutus in Macedonia, and by Pompey in Pharsalus. This irregular and extraordinary recruitment was not, however, typical of recruitment during this period, and Roman law still officially required that legions were recruited from Roman citizens only.