The Bobâlna revolt, a popular revolt in late medieval Europe, began in the village of Bobâlna , Transylvania, in 1437 when a group of Romanian peasants unhappy with serfdom revolted against the feudal nobility and built a camp on the Bobâlna hill.

In June 1437, after they defeated the army of the Hungarian nobility, several social, economical and political demands were met. Soon after, in September 1437, the nobles of Transylvania signed the Unio Trium Nationum, which was a pact of mutual aid formed by the Transylvanian Hungarian, the Saxon and Szekler nobility in order to keep the social status quo.

The revolt continued after this document was signed and after a fight at Apatiu which resulted in a stalemate, a new agreement was signed in October, but which repealed some of the rights which were gained in the previous agreement.

In November, the rebels occupied Turda, Aiud and Cluj-Napoca, but in January 1438, Cluj-Napoca, the last stronghold of the rebels, was regained by the nobility, and the revolt ended with the killing of several thousand Romanian peasants.