A dead German machine gunner abandoned on the Ypres salient. The Ypres Salient is the area around Ypres in Belgium which was the scene of some of the biggest battles in WWI. The Ypres salient was formed by British, French, Canadian and Belgian defensive efforts against German incursion during the 1914 "Race to the Sea", culminating in the Battle of the Yser and the First Battle of Ypres. These battles saved the Ypres salient and the corner of Belgium around Veurne from occupation, but also led to the beginning of trench warfare. The area of the salient is mostly flat, with few rises or hills. Those that did exist became the focus for the 1915 Second Battle of Ypres, which saw the first use of gas and the almost total destruction and evacuation of Ypres, and the 1917 Third Battle of Ypres at Passchendaele. After the third battle, the Ypres salient was left relatively quiet until the Fourth Battle of Ypres, the Battle of the Lys, when the Spring Offensive threatened to overwhelm the entire area. This offensive was stopped at the point the Allies were closest to being forced to abandon the salient. By August 1918, the Fifth Battle of Ypres (part of the Hundred Days Offensive) pushed the German forces out of the salient entirely and they did not return. No date or location available.