As the Russians succeeded in pushing their advance westward, even if only very slowly, they became again somewhat more active in the north along the Black Sea. On May 10, 1916, they were reported advancing both south and southwest of Platana, a small seaport about twelve miles west of Trebizond. Throughout May 11, 1916, engagements of lesser importance took place at various parts of the entire front. During that night the Turks launched another strong night attack in the Erzingan sector, without, however, being able to register any marked success. The same was true of an attack made May 12, 1916, near Mama Khatun. In the south, between Mush and Bitlis, an engagement which was begun on May 10, 1916, concluded with the loss of one Turkish gun, 2,000 rifles and considerable stores of ammunition. In the Chorok sector the Turks succeeded on May 13, 1916, in driving the Russian troops out of their positions on Mount Koph and in forcing them back in an easterly direction for a distance of from four to five miles. There, however, the Russians succeeded in making a stand, though their attempt to regain their positions failed. May 14, 1916, was comparatively uneventful. Some Russian reconnoitering parties clashed with Turkish advance guards near Mama Khatun, and a small force of Kurds was repulsed west of Bitlis. On May 16, 1916, the Russians announced officially that they had occupied Mama Khatun, a small town on the western Euphrates, about fifty miles west of Erzerum and approximately the same distance from Erzingan. Throughout the balance of May, 1916, fighting along the Caucasian front was restricted almost entirely to clashes between outposts, which in some instances brought slight local successes to the Russian arms, and at other times yielded equally unimportant gains for the Turkish sides. To a certain extent this slowing down undoubtedly was due to the determined resistance on the part of the Turks. It is also quite likely that part of the Russian forces in the north had been diverted earlier in the month to the south in order to assist in the drive against Bagdad and Moone, which was pushed with increased vigor just previous to and right after the capitulation of the Anglo-Indian forces at Kut-el-Amara in Mesopotamia. PART VII--CAMPAIGN IN MESOPOTAMIA AND PERSIA CHAPTER XXXIX RENEWED ATTEMPT TO RELIEVE KUT-EL-AMARA