The correct response regarding the United States Army's role in the Meuse-Argonne Offensive is:
U.S. troops fought alongside French troops to break the Hindenburg Line and immobilize the German army.
The Meuse-Argonne Offensive, which took place from September 26 to November 11, 1918, was a significant part of World War I where American forces played a crucial role in a joint offensive to push back German forces and ultimately contributed to the end of the war.