Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The founders of this polity traced their descent from the Kayi tribe. The Candar family of nobles was influential during the early years of this polity. The second ruler of this polity appointed his younger brother Alaeddin as his chief minister, won the Battle of Pekekanon, and gave this polity its first seaport by capturing the city of Mudanya. At its establishment, this polity's armed forces consisted primarily of (*) Ghazi raiders. This polity's capital was moved to Bursa during the rule of Orhan I, who was the son of this polity's founder, Osman. For ten points, name this Anatolian empire that eventually conquered Constantinople.
History