The Motto of Caesar's Legion in Fallout: New Vegas

In Bethesda's Fallout: New Vegas, there is a group called Caesar's Legion that emulates ancient Roman culture. Their uniforms look like Roman military armor, and they make frequent use of spears in battle. They often speak Latin, and they have a Latin motto. Their motto is "Pax per Bellum". This means "peace through war". This reflects the philosophy of Caesar, leader of the Legion who named himself after the famous Roman. He wants to bring order to the new America created by the Bombs by using his Legion to gain authoritarian control. He believes that democracy was what ultimately killed the Old World, so he seeks to eliminate it and install himself as dictator of the Wasteland. Only then does he believe he can maintain peace and begin to rebuild modern society from its ashes. To install himself as dictator, he has to oust all other political factions through war. This is how Caesar's Legion intends to achieve peace through war.