Giving up one's life for general Mitzvos - v5 #14 by R' Aaron Cohen

Rav Oshry was given the task of running a bathhouse that was a lifesaver for the Jews in the Kovno Ghetto, who were suffering ailments and sickness brought on by the terrible hygiene in the ghetto. He made sure that the bathhouse remained closed on Shabbos and Yom Tov. Community leaders expressed concern that if the Nazis found out, Rav Oshry would be killed. Was Rav Oshry permitted to endanger himself in order to prevent Jews from desecrating Shabbos?

Reference Material (pdf)