17 February 2012 UTC And another one this time with a mention of the collapse of AH The seeds of the Hungarian Romanian war of 1919 were planted when the union of Transylvania with Romania was proclaimed on December 1 1918 in the turmoil that surrounded the defeat of the Central Powers in WWI In late March 1919 a Bolshevik government came to power in the new Hungarian state that appeared after the collapse of Austria Hungary and attempted to reinstate Hungarian control over Transylvania by force commencing the war 20 24