Russian forces were making significant gains into Ottoman territory during the Caucasus Campaign. In an attempt to prevent further advances by the Russian army, "Yavuz" rushed 429 officers and men, a mountain artillery battery, machine gun and aviation units, 1,000 rifles, and 300 cases of munitions to Trebizond on 4 February. On 4 March, the Russian navy landed a detachment of some 2,100 men, along with mountain guns and horses, on either side of the port of Atina. The Turks were caught by surprise and forced to evacuate. Another landing took place at Kavata Bay, some 5 miles east of Trebizond, in June. In late June, the Turks counterattacked and penetrated around 20 miles into the Russian lines. "Yavuz" and "Midilli" conducted a series of coastal operations to support the Turkish attacks. On 4 July, "Yavuz" shelled the port of Tuapse, where she sank a steamer and a motor schooner. The Turkish ships sailed northward to circle back behind the Russians before the two Russian dreadnoughts left Sevastopol to try to attack them. They then returned to the Bosphorus, where "Yavuz" was docked for repairs to her propeller shafts until September.