With the start of the Russo-Turkish War (1877–1878), Vereshchagin left Paris and returned to active service with the Imperial Russian Army. He was present at the crossing of the Shipka Pass and at the Siege of Plevna, where his brother was killed. He was dangerously wounded during the preparations for the crossing of the Danube near Rustchuk. At the conclusion of the war, he acted as secretary to General Skobelev at San Stefano.