June 1941. Almost along the entire front line, the forces of the Third Reich and its allies are pushing back units of the Red Army. At this time, a detachment of marines—whom the enemies called “black commissars”—supported by ships of the Danube Military Flotilla and border guard units, lands on the Romanian bank of the Danube. Having seized a broad bridgehead, the sailors courageously held back the onslaught of the Romanian troops for a month and left the enemy shore only by command of the high command. But very few people know about this feat committed right at the beginning of the Great Patriotic War…