the 11 declared wars the U.S. Congress voted on

quote From Fareed Zacharia on CNN Decmeber 7th 2014

Official declarations of War by the U.S. Congress

 Great Britain 1812- The white house was burned down during this war and from it came "The Star Spangled Banner" song.

Mexico 1846
Spain    1898
Germany1917
Austria-Hungary 1917
Japan     1941
Germany1941
Italy       1941
Bulgaria 1942
Hungary 1942
Romania 1942

These are the 11 declared wars the U.S. Congress voted to start or end.

end quote from Fareed Zacharia GPS CNN.