Hitler's country, which was actually Austria, got involved in World War 2 in 1939, the year the war started.
Because their heir to the throne was killed by a Serb.
Austria-Hungary and Serbia.
USA, Austria, Germany, Britain, France,
it was forced to fight against the other countries
second world war, it was the holocaust and the Americans won but many Jews were killed
Austria Hungary did not become one nation after World War 1.
Nothing, they weren't really involved, but Germany invaded them, Chekoslovakia, Ugoslavia, Poland and a few others. So Austria was invaded by Nazi Germany.
The countries involved with World War I are as follows: Allied Powers: France, England, Russia, and United States Central Powers: Germany, Austria-Hungary, and Ottoman Empire
There was no Austria-Hungary after WWI it was broken up after the first world war
World War I started in 1914, when a Bosnian terrorist shot Franz Ferdinand, who was a Duke from Austria-Hungary. Austria-Hungary declared war on Bosnia, which caused a lot of other countries to declare war on each other. Eventually, the whole world was involved.
Although Hitler was of Austrian decent, Austria like Switzerland was neutral in the second world war, so therefore it was not involved and the effect was minimal.