09/12/2026
On this day in 1918, the World War I Battle of Saint-Mihiel began. Nearly half a million American soldiers waited along a 65-kilometer stretch of the Western Front before the offensive opened at 5 a.m.
It was the first major operation planned and executed by the newly formed U.S. First Army under General John J. Pershing. The offensive coordinated infantry with more than 3,000 artillery pieces, 400 French tanks, and nearly 1,500 aircraft—the war’s largest single air operation.
Within days, the Saint-Mihiel salient had been eliminated, improving vital Allied transportation routes and helping prepare American forces for the Meuse-Argonne Offensive.