Our world hasn't only been shaped through battles and wars from the efforts of leaders and heroes, but by traitors, too. From biblical times to the Middle Ages and World War II, human history has also been made with self-serving traitors and collaborators who betrayed their people and nations. Numerous efforts were launched to gain information and secure victories, which many times proved to be successful. But in the end, not everyone got to enjoy the fruits of their betrayal for long.
Click on to read up on the biggest betrayals that changed the course of history.