History of Transylvania union of Transylvania with Romania in Alba Iulia on 1. December 1918.; Bessarabia, having declared independence from Russia in 1917 at the Conference of the Country (Sfatul Țării), called in Romanian troops to protect the province from the Bolsheviks. The union of the Transylvania, Maramureș, Crișana and Banat regions with the Old Kingdom of Romania was ratified in 1920 by the Treaty of Trianon, which recognised the sovereignty of Romania over these regions and settled the border between the Republic of Hungary and the Kingdom of Romania. The union of Bukovina and Bessarabia with Romania was ratified in 1920 by
Socialist Party of Transylvania the latter running instead in Transylvania. Consequently, 21 socialists were elected in the Chamber of Deputies and 3 in the Senate. The Congress tasked with the unification of the movement, initially set for April, was postponed twice, as the dispute regarding international dragged on. In the meantime, a regional Congress of the Socialist Party of Transylvania and Banat was held in Cluj during August 15-17, reaffirmed its support for an unified party and relinquished its independence, declaring it would abide by the programme and statute to be decided by the country-wide socialist Congress. A similar resolution was adopted by the