Yaroslav Stetsko

Yaroslav Semenovych Stetsko was a Ukrainian politician, writer and ideologist 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. From 1942 to 1944, he was imprisoned in Sachsenhausen concentration camp. After World War II, Stetsko was the head of the Anti-Bolshevik Bloc of Nations until his death in 1986.

Source: Wikipedia