Historical Propriety

Historical Propriety is a challenge added in the Fallout: New Vegas add-on Gun Runners' Arsenal.

Obtaining
To complete it, you must kill Caesar with a knife or a combat knife.

Behind the scenes
This is a reference to the death of Julius Caesar, when the conspiring senate surrounded him and stabbed him to death with daggers. It is also a reference to the a conversation you may have with Arcade Gannon, if you enter The Fort with him as your companion and you choose to tell him that you plan to kill Caesar, he will commend you on your sense of historical propriety.