You'll no doubt remember Pompey from his fascination with Alexander the Great. Pompey, Crassus, and Caesar were the so-called first triumvirate, and the alliance worked out super well for Caesar. Not so well for the other two. Let's go to the Thought Bubble. After a year as consul that included getting the senate to pass laws largely because of intimidation by Pompey's troops, Caesar landed the governorship of Gaul, at least the southern part of Gaul that Rome controlled. He quickly conquered the rest of Gaul and his four loyal armies, or legions as the Romans called them, became his source of power. Caesar continued his conquests, invading Britain and waging another successful war against the Gauls.