History, Tradition, Prestige The 3d Infantry Division, known as the "Rock of the Marne," has been a symbol of resilience and valor since its formation in 1917. From the Battle of the Marne in World War I to its crucial role in modern combat, this division has always stood at the forefront of America's military power. The Infantry plays a pivotal role in close combat, engaging directly with the enemy, and ensuring mission success by putting boots on the ground.
