On May 1, 1916, Russian Cossacks were able to drive back Turkish troops, making a stand somewhere west of Erzerum and east of Erzingan. Other detachments of the same service of the Russian army were equally successful on May 2, 1916, in driving back toward Diarbekr resisting Turkish forces west of Mush and Bitlis, and a similar achievement was officially reported on May 3, 1916. On the same date Russian regiments made a successful night attack in the upper Chorok basin which netted some important Turkish positions, which were immediately strongly fortified. May 4, 1916, brought a counterattack on the part of Turkish forces in the Chorok sector at the town of Baiburt, which, however, was repulsed. On the same day the Russians stormed Turkish trenches along the Erzerum-Erzingan road, during which engagement most savage bayonet fighting developed, ending in success for the Russian armies. Turkish attacks west of Bitlis were likewise repulsed. On May 5, 1916, the Turks attempted to regain the trenches in the Erzingan sector lost the day before, but although their attack was supported by artillery, it was not successful. The Russian official statement of May 7, 1916, gives some data concerning the booty which the Russians captured at Trebizond. It consisted of eight mounted coast defense guns, fourteen 6-inch guns, one field gun, more than 100 rifles, fifty-three ammunition wagons, supply trains and other war material. This, taken in connection with the fact that practically the entire Turkish garrison escaped, confirms the view expressed previously that the capture of Trebizond was of great importance to the Russians, not so much on account of what they themselves gained thereby, but on account of what the Turks lost by being deprived of their principal harbor on the Black Sea, comparatively close to the Caucasian theater of war.