History of Targu-Mures

From 1940 to 1944, as a consequence of the Second Vienna Award, the city was ceded back to Hungary. After Hungary was occupied by Germany in 1944, a Jewish ghetto was established in the city. Oşorheiu re-entered the Romanian administration at the end of the war in October 1944. However, on 12 November 1944 General Vladislav Petrovich Vinogradov of the Soviet Red Army expulsed the returning Romanian authorities from Northern Transylvania with reference to the massacres committed by members of Iuliu Maniu's so-called Maniu Guard, and the Romanian authorities were not allowed to return until the government of Petru Groza was formed on 6 March 1945.

After World War II, the communist administration of Romania conducted a policy of massive industrialization that completely re-shaped the community. Between 1950–1968, it was the center of the Hungarian Autonomous Province, later named as Mures-Hungarian Autonomous Region. On 7 September 1959, Gheorghe Gheorghiu-Dej, Secretary-General of the Romanian Workers Party, and the Prime Minister Chivu Stoica visited the city. It was then decided where to build the fertilizer production plant, and the new residential quarters of the city. It was decided that the residential quarters would not be built in the Maros valley, but on the surrounding hills.

In March 1990, shortly after the Romanian Revolution of 1989 overthrew the communist regime, the city was the scene of violent ethnic clashes between ethnic Hungarians and ethnic Romanians.