World War II

World War II, also referred to as the Second World War and regularly shortened to WW2 or WWII, was the massive conflict that saw the first usage of nuclear weapons in war by a superpower, and the formation of the United Nations.

Fallout and Fallout 2

 * Images depicting events leading up to and in World War II appear in the Fallout intro.

Fallout 3

 * In the Museum of History, there is an inaccessible World War II exhibit, the archway reading "1941-1945 American Military Might of World War II."
 * Abraham Washington is in possession of the United States' 1941 declaration of war against Germany.
 * The Anchorage Memorial is based on an iconic image from World War II.
 * The attack on Pearl Harbor is mentioned in the Fallout 3 add-on Operation Anchorage.
 * The atomic bombing of Hiroshima and Nagasaki is mentioned.
 * A WWII-era aircraft, the P-51 Mustang, appears.

Fallout: New Vegas

 * The Fat Man Little Boy kit mod can be bought for the Fat Man, referencing the bomb dropped on Nagasaki.
 * A WWII-era aircraft, the B-29, appears.

Fallout 4

 * The Battle of Iwo Jima is mentioned and is depicted on a mural in the Museum of Freedom.
 * The male Sole Survivor's great-great-grandfather served in the U.S. Army during World War II.

Fallout Tactics

 * Both the Japanese Attack on Pearl Harbor and the atomic bombing of Hiroshima are mentioned in the intro.