1939 to 1945. MLM World war 2 started on the year 1939 and ended in 1945. However, the war between Japan and China began in 1937 but wasn't part of the WW2 time line as it only involved the 2 countries and not the rest of the world yet.
The new strategy of "Island Hopping"; and sometimes, during the war, referred to as "hitting them where they ain't", was a strategy adapted after the bloody "Battle of Tarawa", in November 1943. For further information, see website: World War 2 Time Line 1939-1945; Pacific Islands.
Er... 'cause it's the first world war there was... Answer #2 At the time, it was called "The Great War" because it was the largest war in history to that point. It didn't get the name World War 1 until after World War 2 started.
The Japanese had a mentality of 'no surrender' during World War 2 because they had fought for so long during World War I. The idea that the Japanese might not win the war was inconceivable at the time.