"On July 20, 1916, in accordance with the policy laid down in my instructions, and in order to release French troops for employment elsewhere, I began to take over the line south and west of Lake Doiran, and commenced preparations for a joint offensive on this front. This move was completed by August 2, 1916, and on the 10th of that month an offensive was commenced against the Bulgarian defenses south of the line Doiran-Hill 535. The French captured Hills 227 and La Tortue, while the British occupied in succession those features of the main 535 ridge now known as Kidney Hill and Horseshoe Hill, and, pushing forward, established a series of advanced posts on the line Doldzeli-Reselli. The capture of Horseshoe Hill was successfully carried out on the night of August 17-18, 1916, by the Oxfordshire and Buckinghamshire Light Infantry at the point of the bayonet in the face of stubborn opposition. The enemy's counterattacks were repulsed with heavy loss. [Sidenote: The Bulgarian advance.] [Sidenote: British and French attack.] "On August 17, 1916, the Bulgarians, who, at the end of May, had entered Greek territory by the Struma Valley and moved down as far as Demir Hissar, continued their advance into Greek Macedonia. Columns of all arms advanced from seven different points, between Sarisaban, on the Mesta, and Demir Hissar. The four eastern columns converged on the country about Drama and Kavala, while the remainder moved southward on to the line of the Struma from Demir Hissar toward Orfano. On August 19, 1916, a mounted brigade with one battery carried out a strong reconnoissance, and found the enemy in some force on the line Prosenik-Barakli Djuma; on the following day, after being reinforced by a battalion, this brigade again advanced in conjunction with the French detachment. These attacking troops, after encountering the enemy in force on the line Kalendra-Prosenik-Haznatar, withdrew after dark to the right bank of the Struma. The French detachment was subsequently placed under the orders of the General Officer Commanding British troops on this front, and received instructions to cooperate in the defense of the river line. [Sidenote: Bridges over Angista River destroyed.] "On August 21, 1916, the railway bridge near Angista Station was demolished by a detachment from the Neohori garrison, and three days later two road bridges over the Angista River were destroyed. Both these operations were well carried out by yeomanry, engineers, and cyclists in the face of hostile opposition. [Sidenote: Bulgarians in Eastern Macedonia.]