In 1452, the newly acceded Ottoman Sultan Mehmed II ordered his first campaign against Skanderbeg, the chief of the League of Lezhë. Shortly after the First Siege of Krujë, Murad II died in Edirne, only to be succeeded by his son Mehmed II. Mehmed always supported more aggressive strategies of conquest which his father had continually rejected. Once in power, Mehmed ordered nearly annual invasions of Albania which often resulted in multiple battles in one year. The first of these expeditions was sent in 1452 under the dual-command of Hamza Pasha and Tahip Pasha, with an army of approximately 25,000 men. This campaign was the first major test for the new Sultan against western Europe and a high point of a diplomatic struggle between the major Mediterranean powers.