Petrograd Military Revolutionary Committee

The Petrograd Military Revolutionary Committee (PMRC) (Russian: Петроградский военно-революционный комитет, romanized: Petrogradskiy voyenno-revolyutsionnyy komitet) was a militant group of the Petrograd Soviet and one of several military revolutionary committees that were created in the Russian Republic. Initially the committee was created on 25 October 1917 after the German army secured the city of Riga and the West Estonian Archipelago (see Operation Albion).

Source: Wikipedia — Petrograd Military Revolutionary Committee (CC BY-SA 4.0)