St Omer was the General Headquarters of the British Expeditionary Force from October 1914 to March 1916. The town was a considerable hospital centre with the 4th, 10th, 7th Canadian, 9th Canadian and New Zealand Stationary Hospitals, the 7th, 58th (Scottish) and 59th (Northern) General Hospitals, and the 17th, 18th and 1st and 2nd Australian Casualty Clearing Stations all stationed there at some time during the war. St. Omer suffered air raids in November 1917 and May 1918, with serious loss of life. The cemetery takes its names from the triangular cemetery of the St. Omer garrison, properly called the Souvenir Cemetery (Cimetiere du Souvenir Francais) which is located next to the War Cemetery.  The cemetery was designed by Sir Herbert Baker.