He subsequently commanded the grenadier regiment, and in 1873 the 1st Brigade, 2nd Division, of the cavalry of the Imperial Guard. Although he took part in the Crimean War, being stationed at Belbek, his claim to distinction is due to his service in the Turkish war of 1877. He led the spearhead of the Russian invasion, took Tarnovo on July 7, crossed the Balkans by the Haim Boaz pass—which debouches near Hainkyoi—and, despite considerable resistance, captured Uflani, Maglizh and Kazanlak; on July 18 he attacked Shipka, which was evacuated by the Turks the following day. Thus within 16 days of crossing the Danube, Gourko had secured three Balkan passes and created a panic at Constantinople.