With over a million already dead, heroic American soldiers and nurses served in the closing battles of World War I. New mechanized weapons led to the bloodiest war of the 20th century.
The first officially formed regiment of northern black soldiers who fought in the Civil War.
On June 6, 1944, Allied troops invaded Normandy, fighting to free Europe from Nazi occupation and end World War II.
Joseph Goebbels, the second most powerful man in Nazi Germany, was the mastermind behind Adolf Hitler's success.
During the defining months of the offensive against Germany, American forces faced a moral and strategic dilemma.
After notorious revolutionary leader Pancho Villa's raid on Columbus, New Mexico, General John Pershing and his 150,000 man cavalry set out to get Villa.
Two days in 1967 revealed a nation divided over a war that continues to haunt us.
Ten years after American troops arrived in South Vietnam, communists seized Saigon in an attack that brought the war to a startling conclusion.
A brilliant scientist, Oppenheimer was tasked with the development of the atomic bomb during World War II.