Soviets

Even if it wasn't crawling with commies, it was considered weak and useless in the fight against the Soviets with its diplomacy, treaties and whatnot.

A small army of agents surveilled him day and night, trying to catch him transmitting secrets to the Soviets.

As Soviets approached Auschwitz, Hitler's elite guard, the SS, forced around 60,000 prisoners there - mostly Jews - to move further west.

Shortly before the end of the war, Philby was promoted to head of MI6's anti-Soviet section - meaning he was in charge of running operations against the Soviets while operating as a KGB agent.

He also worked on arms reductions with the Soviets.