The Covenant of Lezha was convened on March 2, 1444, in the Cathedral of Saint Nicholas, in Lezha. The goals of the assembly were the unification of as many principalities of the Balkan countries and beyond known as the lands of the Byzantine Empire. In addition to the Albanian representatives, representatives of the Republic of Venice also gathered in the Assembly as observers.
The creation of a pan-Albanian Covenant was based on the principles of language, customs, and unique traditions, led by Skenderbeu. The treaty provided for the formation of a common army commanded by Skanderbeg as Captain-General and the creation of a common treasury to meet the expenses of the war. The Army of the Covenant was created consisting of the guilds of Albanian benefactors and the personal Guard of Skënderbeu. All the princes pledged to support with soldiers, food, and money, to defend against Sultan Murad II. The annual income of the Covenant army came from the payments of the princes of the principalities. The League of Lezha was a political-military alliance based on majority decisions by the assembly respecting the rule of the nobles in their lands. According to the agreement, hostilities over land ownership would be stopped or submitted to the association, which would resolve them by majority decision. This was easily achieved since all the participating nobles or members of the League of Lezha had put their military forces under the command of Gjergj Kastrioti who, according to the agreement, would only use them against the threatening armies of the members of the League.
The connection of Lezha in Albanian history marks a step before the unification of the Albanian lands in a centralized state, with which the state tradition in the Albanian Middle Ages reached its peak.
On the principles of the League of Lezha, four centuries later the Albanian League of Prizren and other authentic national Covenants were founded, which were based on the Albanian codex of organization for survival in certain conditions and circumstances of history.