Transylvania backed by the mobilization of Romanian troops, proclaimed Union with Romania on 1 December 1918. The "Proclamation of Union" of Alba Iulia was adopted by the Deputies of the Romanians from Transylvania, and supported one month later by the vote of the Deputies of the Saxons from Transylvania. The national holiday of Romania, the Great Union Day (also called "Unification Day") occurring on December 1, celebrates this event. The holiday was established after the Romanian Revolution, and marks the unification not only of Transylvania, but also of the provinces of Banat, Bessarabia and Bukovina with the Romanian Kingdom. These other
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