The actor who's sitting on the jeep plays a role of an officer, who at first had been a POW in a Soviet camp - together with the rest of his colleagues, who got murdered in Katyn.
These are pictures showing him at that time (with a lieutenant insignia on his shoulders)
But later he turned out to be one of the very few officers, who decided to collaborate with the Soviets.
Owing to that he saved his life and became a major.
And here you can see him as a major of pro-Soviet Polish Army in 1944 or 1945 (visiting the wife of his friend, who had fallen in Katyn)
