Second world war kab aur kaise hua

 The Second World War was a global war 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 primarily fought in Europe and Asia, but it also spread to Africa and the Americas. It is considered the deadliest conflict in human history, with an estimated 70-85 million fatalities, both military and civilian. The war ended with the unconditional surrender of Germany on May 8, 1945, and the dropping of atomic bombs on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9, 1945, respectively.