Romania was between Austro-Hungary and Russia.
Romania was against Germany and Austro-Hungary.
Between 1914-1916 Romania was neutral.In august 1916 Romania joins the Triple Entente and mobilizes against Austro-Hungary. = =
Romania wanted Transylvania (from Austria-Hungary) - and got it at the end of the war.
Austro-Hungary attacked Serbia.
Austria-Hungary split into quite a number of countries. The countries of Austria, Hungary, and Czechoslovakia are the three countries who are wholly formed from former Austro-Hungarian territory. The remaining parts of the Austro-Hungarian Empire went to Italy, Yugoslavia, Romania, and Poland.This map shows how the Austro-Hungarian Empire was divided.
the way Hungarians were treated in those countries
Bulgaria was with Germany and Austro-Hungary
At the end of World War 1, the Austro-Hungarian Empire became Austria, Hungary, Czechoslovakia (now the Czech Republic and Slovakia), Poland and Yugoslavia (now Serbia, Croatia, Slovenia, Bosnia Herzogovina, Montenegro and Macedonia). Also, some Austro-Hungarian lands were ceded to Romania, Ukraine and Italy.
At the end of World War 1, the Austro-Hungarian Empire became Austria, Hungary, Czechoslovakia (now the Czech Republic and Slovakia), Poland and Yugoslavia (now Serbia, Croatia, Slovenia, Bosnia Herzogovina, Montenegro and Macedonia). Also, some Austro-Hungarian lands were ceded to Romania, Ukraine and Italy.
hungary
Austria, Galicia, Bohemia, Moravia, Central Hungary (Banat Region), Northern Hungary, Eastern Hungary (Transylvania) and Western Hungary.