"manifest destiny" refers to the belief that had given the u. s. a mission and right to extend civilization across the continent.

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).

by 1880, germany had more rail lines than great britain and russia.