Romanian anti-communist resistance movement
The Romanian anti-communist resistance movement began in 1944 as Soviet troops entered Romania and was active from the late 1940s to the mid-1950s, with isolated individual fighters remaining at large until the early 1960s. Armed resistance was the first and most structured form of resistance against the Romanian People's Republic, which in turn regarded the fighters as "bandits".
Source: Wikipedia — Romanian anti-communist resistance movement (CC BY-SA 4.0)