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 battle of Alcacer Ceguer and the defeat of the Moors at Ceuta bookended his brief military career and he organized the assault on Sala-ben-Sala's forces at Tangier. He was assisted in his most important tasks by the Jew Jehuda Cresques, who lived with him at his estate of Sagres. Zurara is the best source for relations between this man and men such as Gil Eanes, Goncalves Zarco, Dinis Dias, and Nuo Tristao, who sighted the Gambia River. The son of Juan I and Philippa of Lancaster, he sponsored the development of the caravel and quadrant and the exploration of Porto Santo and Madeira. FTP, name this prince of Portugal who, despite never having commanded a ship, was nicknamed "The Navigator. "
History