The Battle of Saint-Mihiel was a significant military engagement during World War I, occurring from September 12 to 15, 1918. This battle marked the first major American offensive in the war, where U.S. forces led an assault against German positions in the Saint-Mihiel salient in France. It showcased the growing strength and capability of American troops and played a crucial role in the overall Allied strategy to push back the German forces on the Western Front.