Caesar's Legion

Caesar's Legion is a large Roman Empire-inspired imperialist raider organization who are the main villains of Fallout: New Vegas. They are led by a man named Caesar who named himself as such after reading about Julius Caesar and decided to recreate his dictatorship in post-apocalyptic America. He began teaching the Roman warfare tactics to the tribes around him and slowly recruiting and uniting them under his banner. Eventually, Caesar had created an empire of 86 tribes spanning throughout parts of Arizona, Utah, Colorado and New Mexico.

The Legion is a brutal organization, who enslave everyone they come across and kill anyone who resists. They frequently crucify their victims. They are unapologetically sexist, believing that women are inferior to men both physically and intellectually and treat them as little more than slaves. They discipline their people through intense physical labor and torture, and forbid the use of medicine and painkillers, considering them a sign of weakness. Most mechanical devices are also outlawed. Their more backhanded atrocities are carried out by a special group called the "Frumentarii", who act as Caesar's "Secret service" of sorts and are led by the diabolical Vulpes Inculta.

When the growing Legion encountered the New California Republic in the 2270's, it found a truly worthy opponent for the first time ever. At the first battle of Hoover Dam, Caesar's Legion suffered its first ever military defeat to the NCR, due to the poor leadership of Legate Joshua Graham, who as punishment was burned alive and thrown into the Grand Canyon.

During the events of the game, the Legion is currently preparing for a second assault on the NCR-controlled Hoover Dam, this time taking no prisoners and led by their new general Legate Lanius. You can choose to be evil and side with Caesar's Legion if you want, but in all other ending paths the Legion will be the main enemies in the climactic final battle at Hoover Dam, and Lanius is the final boss.