The "Warrior March", also known by its incipit "Come, We Shall March in Joint Endeavour", was the national anthem of the short-lived Belarusian Democratic Republic that existed from 1918 to 1919.
Original sheet music of the anthem, 1919.
The first government of the People's Republic. Sitting, left to right: Aliaksandar Burbis, Jan Sierada, Jazep Varonka, Vasil Zacharka. Standing, left to right: Arkadź Smolič, Pyotra Krecheuski, Kastuś Jezavitaŭ, Antoni Owsianik, Leanard Zajac.