World War II - The Global Catastrophe and Its Enduring Legacy

One of the biggest and most destructive wars in human history was World War II, which lasted from 1939 to 1945. Its roots may be seen in the aggressive expansionist tactics of Nazi Germany, which Adolf Hitler oversaw. Germany's unprovoked invasion of Poland in September 1939 served as the war's catalyst. Britain and France responded to this egregious crime by declaring war on Germany in a timely and firm manner.