1939-1945 War

The 1939-1945 war, known as World War II, was a global conflict mainly between the Allies (including the US, Britain, and Soviet Union) and the Axis powers (mainly Germany, Japan, and Italy). It started when Germany invaded Poland, prompting Britain and France to declare war. The war involved massive battles, technological advances, and atrocities like the Holocaust. It caused widespread destruction and loss of life worldwide. The conflict ended in 1945 with Allied victory, leading to significant geopolitical changes and the founding of the United Nations to promote peace.