Why did supporters of Manifest Destiny argue that US expansionism was not imperialism? The United States already had interests in its expansion areas. The United States had no plans to overthrow existing governments. The United States believed expansion would benefit other countries, not exploit them. The United States believed it deserved more territory as a democratic, Christian nation.

The United States believed expansion would benefit other countries, not exploit them.

explanation: d

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).