Yaroslav Semenovych Stetsko was a Ukrainian politician, writer, ideologist and Nazi collaborator, who served as the leader of Stepan Bandera's faction of the Organization of Ukrainian Nationalists, the OUN-B, from 1941 until his death. During the German invasion of the Soviet Union in 1941, he was named the temporary head of an independent Ukrainian government which was declared in the act of restoration of the Ukrainian state. During 1942-1944 was imprisoned in Sachsenhausen concentration camp. After the WW2, Stetsko was the head of the Anti-Bolshevik Bloc of Nations until his death in 1986.

Stepan Andriyovych Bandera was a Ukrainian far-right leader of the radical militant wing of the Organization of Ukrainian Nationalists (OUN-B).