Rozszumiały się wierzby płaczące (Weeping willows are crying) - Polish partisan song - Lyrics

The song was popular among polish partisans during ww2.
The flags shown are (in order):
Armia Krajowa - Home Army, the core of organized Polish resistance
Bataliony Chłopskie - Peasant Battalions, previously known as Peasant Guards (Straż Chłopska), the text reads "Through struggle, to victory"
Żydowski Związek Wojskowy - Jewish Military Union, which operated mainly in Warsaw
Żydowska Organizacja Bojowa - Jewish Combat Organization, operated throughout Poland
Związek Jaszczurzy - Lizard Union, far-right resistance group, which also operated against the Soviets