From Cold War spies to Aztec conquerers, these famous betrayals are a reminder that human history isn’t marked solely by acts of good will.

March 15th, better known as the Ides of March, marked the first half of the first month of the year in the Roman Calendar. In 44 BC, it also marked one of history’s most notorious betrayals and brutal political assassinations: that of Julius Caesar by his friend, Brutus. In the spirit of betrayal, we’re looking at a few more shocking betrayals from history in celebration of the Ides: starting, of course, with Brutus and Caesar…