The Second World War,
The Second World War The Second World War was a global military conflict that lasted from 1939 to 1945. It involved the majority of the world's nations, including all of the great powers, organized into two opposing military alliances: the Allies and the Axis. The war was characterized by a scale of destruction and loss of life that was unprecedented in human history, with an estimated 70-85 million fatalities. The war began on September 1, 1939, when Germany, under the leadership of Adolf Hitler, invaded Poland. This led to the United Kingdom and France declaring war on Germany. In 1940, Germany quickly defeated France and began a series of air attacks on the United Kingdom known as the Battle of Britain. In 1941, Germany invaded the Soviet Union in a massive military campaign known as Operation Barbarossa. The entry of the United States into the war following the Japanese attack on Pearl Harbor in December 1941 marked a turning point in the war, as the combined industrial and m...