Reliable documents show that up until the end of the 15th century, the term Zeta was simply used encompassing Pješivci, Malonšići, Očinići, Lopate and Bjelice.
At the end of September 1441, the Bosnian grand duke, Stefan Vukčić Kosača, captured the territory of Upper Zeta on the left bank of Morača river.
Venetian doge Francesco Foscari wrote a letter to Stefan in 1455 asking him to return to Budva its territory he captured.
[6] In 1455 the Ottomans invaded Serbia and conquered all of its territories south of the Western Morava river, completely cutting Zeta off from the core of the Despotate.
Стефан Вукчић је провалио у Горњу Зету и најприје заузео крајеве до Мораче.