Kingdom of Romania - World War I

World War I

Romania delayed in entering World War I, but ultimately declared war on the Central Powers in 1916. The Romanian military campaign ended in disaster when the Central Powers quickly crushed the country's armed forces and occupied most of the country, including the strategically important oil fields. But after the war ended, Romania's government quickly reasserted control and put an army back into the field. Transylvania was soon overrun, as was Moldavia, since the power vacuum in Russia caused by the civil war there allowed Romania to assert its claims over that territory. War with the Hungarian Soviet Republic in 1919 resulted in the occupation of Budapest by Romanian troops and the end of Béla Kun's bolshevik regime.