The Ottomans waged several wars of varying success, but spent more efforts on bringing the heathens to the one true faith of islam. The Balkan states occupied by the Ottomans now are predominantly islamic.
Otherwise, a successful war against Castille, Aragon and the Knights saw Albania, Kosovo and Ragusa seized off the former, and Rhodes taken as the last bastion of the knights was overwhelmed. Karaman also was annexed, as was lone Cyprus. At this stage, a large war developed with Hungary & Georgia combining with several islamic states attacking our borders. We are not well liked after our conquests it seems. With victories in the west, but defeats in the east, the Ottoman Empire decided discretion was the better part of valour, as a series of calamatious events eroded state stability. Sivas was ceded as the price of peace. The shame of this will surely propel the armies of the prophet in a renewed series of attacks sometime in the future.