The St Symphorien Military Cemetery is a First World War Commonwealth War Graves Commission burial ground in Saint-Symphorien, Belgium. It contains the graves of 284 German and 229 Commonwealth soldiers, principally those killed during the Battle of Mons. The cemetery was established by the German Army on land donated by Jean Houzeau de Lehaie. It was initially designed as a woodland cemetery before being redesigned by William Harrison Cowlishaw after the Imperial War Graves Commission took over maintenance of the cemetery after the war.

The Battle of Mons was the first major action of the British Expeditionary Force (BEF) in the First World War. It was a subsidiary action of the Battle of the Frontiers, in which the Allies clashed with Germany on the French borders. At Mons, the British Army attempted to hold the line of the Mons–Condé Canal against the advancing German 1st Army. Although the British fought well and inflicted disproportionate casualties on the numerically superior Germans, they were eventually forced to retreat due both to the greater strength of the Germans and the sudden retreat of the French Fifth Army, which exposed the British right flank. Though initially planned as a simple tactical withdrawal and executed in good order, the British retreat from Mons lasted for two weeks and took the BEF to the outskirts of Paris before it counter-attacked in concert with the French, at the Battle of the Marne.