The U.S. Army Campaigns of World War II

When Hitler's army invaded Poland on 1 September 1939, World War II began.By 1947 the Army numbered a mere 700,000--sixth in size among the armies of the world.A Brief History of the U.S. Army in World War II.World War II was the largest and most violent armed conflict in the history of mankind.World War I left unresolved the question of who would dominate Europe.A worldwide depression that began in 1929 destroyed the fragile democratic regime in Germany.Yet some innovative thinking and preparation for the future took place in the interwar Army.The French Army, plagued by low morale, divided command, and primitive communications, fell apart.Army and the National Guard.But the artillery established itself as the Army's most proficient arm.