How did American entry into world war 1 affected Germany stretagy?

The American entry into World War I in 1917 significantly altered Germany's military strategy, forcing them to reconsider their approach on the Western Front. With fresh American troops and resources bolstering the Allied forces, Germany shifted from offensive tactics to a more defensive posture, realizing that their earlier war strategies were unsustainable. They attempted to launch a series of major offensives in 1918, known as the Spring Offensive, to secure a decisive victory before American forces could fully mobilize, but ultimately these efforts failed, leading to a collapse of German morale and military effectiveness.