The World War I Chateau-Thierry American Monument, designed by Paul Cret, is located on a hill two miles west of Chateau-Thierry, France, and commands a wide view of the valley of the Marne River. It commemorates the sacrifices and achievements of the Americans and French before and during the Aisne-Marne and Oise-Aisne offensives.

The monument, also known as the American Aisne-Marne Memorial or Le Monument americain a cote 204, consists of an impressive double colonnade rising above a long terrace. On its west facade are heroic sculptured figures representing the United States and France. On its east facade is a map showing American military operations in this region and an orientation table pointing out the significant battle sites.

German advances in late May 1918 led to the 3rd Division joining the fight. Its units assisted French troops in preventing the Germans from crossing the Marne River. The 3rd Division held the south bank of the Marne until the French American counteroffensive forced German withdrawal. It earned the nickname 'Rock of the Marne.' At the nearby cemeteries rest those Americans who gave their lives in the service of their country.