The Romanian Communist Party was a communist party in Romania. Successor to the pro-Bolshevik wing of the Socialist Party of Romania, it gave ideological endorsement to communist revolution and the disestablishment of Greater Romania. The PCR was a minor and illegal grouping for much of the interwar period, and submitted to direct Comintern control. During the 1930s, most of its activists were imprisoned or took refuge in the Soviet Union, which led to the creation of separate and competing factions until the 1950s. The Communist Party emerged as a powerful actor on the Romanian political scene in August 1944, when it became involved in the royal coup that toppled the pro-Nazi government of Ion Antonescu. With support from Soviet occupation forces, the PCR was able to force King Michael I into exile, and establish undisguised Communist rule in 1948.