either of two World War I battles that took place at the Marne River, in France. In the first one (Sept. 6 - 9, 1914), the Germanadvance on Paris was halted by the Allies. In the second (July 1918), the last great Germanadvance of the war was decisively repulsed by the Allies. —SHSBC Binder 32 Approved Glossary