Hungary–Romania relations
During World War II, Hungary and Romania became allies and participated in the war against the Soviet Union. But after the coup on 23 August 1944 Romania switched sides and fought against Hungary. Consequently, Soviet and Romanian troops invaded Hungary, occupied Northern Transylvania by October 1944 and re-established the Romanian administration in the region in March 1945. The 1947 Treaty of Paris reaffirmed the borders between Romania and Hungary as originally defined in Treaty of Trianon 27 years earlier, thus confirming the return of Northern Transylvania to Romania.
Constantin Brătescu
Constantin Brătescu (March 8, 1892 – April 13, 1971) was a Romanian Major-General during World War II. In 1941, he served first as Chief Propaganda Section General Staff (Romania's Propaganda Minister) and then as a Romanian liaison officer to the German Military Mission, meaning that he served as a German military officer during Operation Barbarossa and the Axis Invasion of the Soviet Union. Starting in 1942 Brătescu was a Romanian General Officer (at the rank of Major-General) and commanded the 1st Cavalry Division throughout the campaign against the Soviets, fighting in such engagements as Operation Barbarossa, Operation Blue, and the Battle of Stalingrad. Following the surrender of Friedrich Paulus' 6th Army at the Battle of Stalingrad, Brătescu became a prisoner of war and was held captive from 1943 to 1948. Finally, in 1948, he was released after five years of imprisonment and subsequently retired from active service. Bratescu ultimately died twenty-three years later, in 1971, at the age of seventy-nine.