There were three battles of Aisne between Allied and German forces in northern France during the Great War. The first battle occurred in September 1914 and was inconclusive and left both sides entrenched along lines they held for most of the rest of the war. The second battle between April and May 1917 cost both the French and Germans heavy casualties and was one of the prime causes of the mutinies in the French army the following month. In the final battle in June 1918, the Germans nearly succeeded in breaking through to Paris. Research Battle of Aisne