The Battle of Langemarck was a World War I military encounter between British forces and the Imperial German Army, being part of the major Third Battle of Ypres. It was fought from August 16 to August 18, 1917, in and near Langemarck, Belgium. It consisted of a British Fifth Army assault on the German lines, supported by artillery creeping barrage. On the left flank, the British infantry units were able to advance about 2,000 yards; however, on the right flank the Allied offensive was stopped on its track by stubborn enemy troops defending their positions that mowed the British down with lethal machine gun fire. On the second day of the battle, German Eingreif units launched a fierce counter-attack that drove the British and French troops back almost to where they had started. Mud and rain slowed the German counter-offensive. As in most WWI battles, both sides suffered large number of casualties.
British: Fifth Army’s 8 infantry divisions, supported by two French divisions
German: 4th Army’s 5 Eingreif division, plus 6 regular infantry divisions
British: Hubert Gough
German: Crown Prince Rupprecht
Below: German Eingreif troops preparing for a counter-attack