It was established as a breakaway faction (or spin off) from the main, historical National Liberal Party (PNL) in 1944.
[1] At the November 1946 elections, the Bloc won 347 of the 414 seats, with the PNL-T taking 75.
[2] In the 1948 elections, the party ran separately as PNL-Bejan, in opposition to the Communist governmental coalition led by Petru Groza and only receiving 7 seats in the Great National Assembly (Romanian: Marea Adunare Națională), the unicameral Romanian Parliament back then and the equivalent of the nowadays Chamber of Deputies.
The party was subsequently banned (or dissolved) by the Romanian Communist authorities in 1950.
In stark contrast to the breakaway faction led by Tătărescu and then by Bejan, the main, historical PNL which was led by its last president, Dinu Brătianu, until it was banned (or dissolved) by the Romanian Communist authorities as well (early on in 1948), remained staunchly anti-governmental and in continuous opposition towards the Communists led by Groza.