Unio Trium Nationum

In other regions called Seats, the free Székely and Saxon nations lived without feudal landlords and had the royal privilege to have local authority and self-government.

Pál Vajdaházi, one of the leaders of the revolt, was referred to in this document as vexilifer Universitatis regnicolarum Hungarorum et Valachorum huius principatus Hungariae (Standard-bearer of the Union of Hungarian and Romanian inhabitants of this province of Hungary).

[citation needed] Despite the pressing issues at hand, the Transylvanian Diet was still not called together by the Voivode, resulting in the various nobles initiating a meeting of the three nations.

The alliance of mutual aid, signed in Kápolna (present-day (Căpâlna), was called the Fraterna Unio (Brotherly Union), and was designed to protect the parties both from revolts and Ottoman attacks.

While the existence of the Union helped the indigenous inhabitants to re-negotiate and partly modify the terms of the previous agreement, the alliance did not organize any serious military operations until the end of 1437.

After the successful campaign, the alliance of Hungarian nobles, Székelys, and Saxon elite was codified in the Unio Trium Nationum ("Union of Three Nations") on February 2, 1438.

The Union ensured that the (Hungarian and Romanian) serfs continued to be excluded from the political life of Transylvania, although they were the majority of the population in the Noble Counties (Comitates).