Italy declared war on Austria-Hungary and Germany.
Italy declared war among Austria-Hungary on May 23rd,1915 during World War I.Italy declared war among Germany on October 13th, 1943, making them join the battle on the Allies side.
Italy has also declared war on:
May 23rd 1915 - Austria-Hungary
June 10th 1940 - United Kingdom
June 10th 1940 - France
December 11th 1941 - United States
October 13th 1943 - Germany
Because he was so against communism
The Treaty of Versailles stated (to name a few) that Germany had to have a small army/navy/air force and couldn't try to expand their empire by taking over other countries, Hitler did this anyway, sparking WW2.
Changes: Constitutional end to slavery and granted citizenship and voting rights.
Continuities: Blacks continued to work on plantation lands doing much the same work as before 1865. They were segregated from whites and often were not given the right to vote.