How the Ottoman Empire Conquered Bosnia in a few Weeks! The Ottoman Empire's conquest of Bosnia in 1463 was rapid and strategic, relying on effective military tactics and political maneuvers. Following the death of the Bosnian king, internal strife weakened the region, making it vulnerable to invasion. The Ottomans, led by Sultan Mehmed II, capitalized on this chaos. Using a well-organized army, the Ottomans employed siege warfare and employed highly mobile cavalry units to outmaneuver Bosnian f