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.
Miron Constantinescu
In World War II, authorities were alarmed by his alleged contacts with the Soviet Union and NKVD agents, at the time when Ion Antonescu's regime allied itself with Nazi Germany and took part in Operation Barbarossa ("see Romania during World War II"). Eventually, he was arrested and interned, initially in the camp in Târgu Jiu. Although, like Preoteasa, he was originally close to Lucrețiu Pătrășcanu (who was himself an intellectual isolated among PCR members), Constantinescu associated with Gheorghiu-Dej/Emil Bodnăraș faction while in detention, endorsing successful moves against rival leader Ștefan Foriș.