Father Jan Bak, from the Gniezno-Poznań archdiocese in Poland, resided in a section of Poland that had been taken over by the Socialist Germans and renamed Warthegua.
Father Bak was arrested, on October 6, 1941, swept up in the mass arrests of Polish Catholic priests on the 6th and 7th of October 1941, in Warthegua.
The arrests followed the September 13, 1941 Socialist German's implentation of the decree of "Without God, Without Religion, Without Priest and Sacrament," in the German-occupied Warthegau.
That policy of German Socialist Arthur Greiser (the governor of Warthegua) dissolved the Roman Catholic Church and replaced it with the Catholic German National Church, separate from the Vatican and subject to German law.
Father Bak was held in a Posen jail, then shipped to Dauchau extermination camp, on October 30, 1941, where he received the number 28422.
Transported to Hartheim Euthanasia Center, he was murdered in a gas chamber, on May 4, 1942.
VIVA CRISTO REY! Niech żyje Chrystus Król!