During the Battle of Slivnitsa, part of the Serbo-Bulgarian War in 1885, a large group of Serbian Army was defending their positions at Slivnitsa and was reinforced before by a 135-kilometer march from southern Bulgaria to the Slivnitsa position. When the two battalions of the Serbian Army' Danubian Regiment arrived on the battlefield, Captain Benderev as the commander of the Bulgarian Army issued order to take Serbian positions immediately. This attack of the Danube Regiment is the most glorious and most important moment in Bulgarian history. Without a fight, in the performance of Shumi Maritsa, the Danube Regiment quickly climbed on a steep cliff. When the Serbian army heard the sound of the Shumi Maritsa", the Serbian Army escaped panically. The attack by the Bulgarian army ends the battle with the Serbs retreating.