Complex sentence: After years of fighting resulting in the Hungarian army expelling the Ottomans from Serbia, the peace of Szeged between King Vladislaus and Sultan Murad restored the Despotate late in the summer of 1444, and included in the redefined territory, after much discussion, was Golubac fortress.
Split into simpler sentences: After years of fighting, which resulted in the Hungarian army expelling the Ottomans from Serbia, the peace of Szeged restored the Despotate late in the summer of 1444. Included in the redefined territory, after much discussion, was Golubac fortress.