Wilson pivots from neutrality amid economic tilt and growing war pressures in Europe.

Lusitania, submarine warfare, and Zimmermann push the U.S. toward declaring war.

Selective Service, home-front agencies, and industrial gearing build a massive U.S. war effort.

Pershing forges an independent American army; Cantigny, Belleau Wood, and Meuse-Argonne prove its mettle.

Versailles, League debate, and a reluctant US retirement from the idealistic dawn of a new order.