By Second Vienna Award , concluded on 30 August 1940 , arbitrated by Nazi Germany and Fascist Italy , Romania had to cede to Hungary Northern Transylvania . Until March 1945 , when the ceded part will return to Romania ( during Petru Groza government ) , Sălaj was part of Hungary again . Between 1940 and 1944 , in Szilágy County notable incidents happened , claiming the lives of 495 people , most of them culminating in the Ip and Treznea massacres . Beginning in 1944 , Romanian forces with Soviet assistance recaptured the ceded territory and reintegrated it into Romania , re-establishing the county . Starting with 14 October 1944 , Romanian armies carried military operations in the territory , however , the Romanian administration was expelled from these territories in October due to the activities of the Romanian paramilitary groups created in the area to avenge the atrocities committed by the Hungarians against the Romanians during the Hungarian rule in Northern Transylvania . Romanian jurisdiction over the county per the Treaty of Trianon was reaffirmed in the Paris Peace Treaties , 1947
Ip
Ip massacre
Sălaj County