Please review the guidelines on asking for help with homework that can be found here:

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This is very easy to research.

I found the answer in about 10 seconds using google (http://www.google.com/#sclient=psy&hl=en&q=when+did+ww2+end&aq=1&aqi=g5&aql=&oq=&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=eec7b1769f792670).

Or if you really want to argue, one could say or ask if it really ever got over, but merely moved to a more political or economical fight between some of the main nations