Dan Snow explains the most destructive war in history. From its origins through the dark days of 1940 through to the defeat of Germany and the dropping of the atomic bomb. World War Two changed the world. <br /><br />00:00 Introduction<br />01:10 When Did WW2 Start?<br />02:39 1939<br />05:49 1940<br />12:11 1941<br />15:56 1942<br />17:41 1943<br />20:31 1944<br />23:26 1945<br />26:55 Post-WW2
