 With this support, Skanderbeg built fortresses and organized a mobile defense force that forced the Ottomans to disperse their troops, leaving them vulnerable to the hit-and-run tactics of the Albanians.He managed to create the League of Lezha, a federation of all Albanian Principalities.The main members of the league were the Arianiti, Balšić, Dukagjini, Muzaka, Spani, Thopia and Crnojevići.For 25 years, from 1443–1468, Skanderbeg's 10,000 man army marched through Ottoman territory winning against consistently larger and better supplied Ottoman forces.