Войникът от обоза (1975)

In September 1944, the red army crosses the Danube. Private Ales together with his agricultural horses follows the victory march. A broken wheel of his cart forces Ales to fall behind and look for help in the nearby village. The "odyssey" of the common cavalry soldier begins. He becomes a friend with the Bulgarian peasants. They need to part ways with a hidden sadness and true love. —Georgi Djulgerov

Unfortunately the movie Войникът от обоза is not yet available on HBO Max.