World War II[b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries …

Dec 11, 2025 · World War II, conflict that involved virtually every part of the world during the years 1939–45. The war was in many respects a continuation, after an uneasy 20-year hiatus, of the …

It was the biggest and deadliest war in history, spanning six grueling years and involving countries in nearly every part of the world. Sparked by the 1939 Nazi invasion of Poland, World War...

May 2, 2025 · World War II (WWII) was a long and bloody war that lasted about six years. Officially beginning on September 1, 1939, when Germany invaded Poland, World War II lasted until both the …

Learn all about the major events of World War II from 1918 to 1942.

Explore a detailed timeline of World War Two - the causes, events, soldiers and its aftermath. Discover facts about what happened during the most destructive war in history.

This fascinating and revealing series of 42 one-hour programs, documents all the political history and events leading up to the outbreak of war; and details all the major campaigns and battles...

Learn more about World War II history through WWII scholarship from The National WWII Museum.

ABMC honors the services of overseas U.S. armed forces by maintaining and promoting America’s overseas commemorative cemeteries and memorials.

Read everything you need to know about the Second World War, by exploring our WWII archives of in-depth history articles, podcasts, slideshows and more.