News/Events around the area, 1428 AD:

Golubac/Serbia:

After Despot of Serbia, Stefan lazarević, death in 1427, Sigismund, king of Hungary hurried to have the clauses of the Tata contract fulfilled, and Belgrade and Mačva were handed over without a problem. However, Golubac's commander, Voivode Jeremija, demanded compensation of twelve thousand ducats. When Sigismund refused to pay, Jeremija handed Golubac to the Turks, who turned it into the pasha's residence.

Despite gaining Golubac, Sultan Murad II was not pleased with the increased Hungarian influence elsewhere in Serbia, so he sent his army to attack. One squad came from Golubac and targeted nearby Serbian and Hungarian settlements in the Braničevo region. In response, the new Despot of Serbia, Durađ Branković, personally traveled to Golubac, promising forgiveness to Jeremija and urging him to return the fortress by any means possible. The Voivode refused and attacked the Despot when he and his escort attempted to enter the walls. These betrayals were followed in 1428 by the Battle of Golubac.

Around April 1428, Sigismund amassed an army of twenty-five thousand infantry, six thousand Wallachian archers led by Prince Dan II, 100 Italian artillery, and a number of Polish cavalry on the far side of the Danube, then attacked Golubac and the Turks. He also had ships attacking from the river, one of which was commanded by Cecília Rozgonyi, the wife of Comes István Rozgonyi of Timișoara. Murad rushed to help the besieged Turks, arriving in late May. Sigismund, who did not wish to fight the bigger army, finalized a balanced treaty by early June. Once part of the Hungarian army had withdrawn to the far side of the river, however, the Turkish commander Sinan Bey attacked their rear, capturing and killing those who remained, among them the Polish knight Zawisza Czarny. Sigismund was nearly caught with the rest of his army; however, Cecília Rozgonyi intervened, and she was solely responsible for his rescue. Sigismund then granted a hereditary right to Golubac to Cecilia and her brothers.

After that, Murad fortified his borders against Serbia and Hungary but did not try to retake Wallachia, instead, he sent his armies to Anatolia where they defeated Karaman in 1428.

Thessaloniki/Macedonia:

Throughout the confrontation over Thessalonica, the Ottomans launched constant raids against Venetian possessions in Albania. In early spring 1428, the Ottoman fleet launched a major raid against Venetian possessions in Greece: 40 to 55 vessels raided the island of Euboea and took about 700 Venetian citizens prisoner, before going on to raid the environs of the two Venetian outposts of Modon and Coron in the southwestern Morea. When news arrived in Venice on 22 April, even though the previous year's guard fleet under Guido da Canal was still abroad, a guard fleet of 15 galleys was authorized to hunt the Ottoman raiders, under Andrea Mocenigo. In the event, the new fleet did not sail until September, after Canal's fleet was defeated at Gallipoli by a coalition of Ottoman and Christian ships. The Ottoman naval threat became particularly acute at this time due to the defection of the Duke of Naxos, Giovanni II Crispo (r. 1418–1433). Although a Venetian citizen and vassal of the Republic, mounting Ottoman pressure on his possessions had forced the Great Council to authorize him to enter into a separate peace treaty with the Ottomans, which Crispo duly did. As a result, Crispo was forced to effectively assist the Turks in their own raids and ceased signaling the Venetians in Euboea of impending Ottoman raids via beacons.