By the time World War Two had initiated, Bolesław had completed four grades at the state gymnasium and high school named after Adam Mickiewicz in Grodno.

Due to his father—Konstanty—constantly engaging in battles with the Red Army, the NKVD deported him and his family to Kazakhstan in February 1940 in retaliation.

[1] In May 1943, Bolesław joined the Red Army, volunteering for the 1st Tadeusz Kościuszko Infantry Division; he was later promoted to the rank of ensign.

He fought as a platoon commander in the machine gun company of the 3rd battalion, 3rd Infantry Regiment [pl].

In the beginning of 1944, he became the deputy commander of the 8th company; later, he completed a battalion command course at the Officers' Infantry School in Ryazan and, as a distinguished graduate, remained in its staff—even after the school was relocated to Lublin—as the head of the head of the scientific department of the heavy machine gun battalion.