In ww1 what battle did the help of the US led to a major turning point in the war in favor of the allies due to a cease fire agreement with Germany?

The Battle of Cantigny, fought in May 1918, marked a significant turning point in World War I, as it was the first major American offensive. The successful U.S. forces helped to boost Allied morale and demonstrated the effectiveness of American troops. Although the war continued until November 1918, the U.S. involvement, particularly in battles like Cantigny and later the Meuse-Argonne Offensive, contributed to the pressure on Germany that ultimately led to the armistice and ceasefire agreement on November 11, 1918.