He made 4 voyages and all of them were between 1492 and 1502 sorry idk the exact dates
The Umayyads were unable to conquer the nascent Christian Kingdoms in the North which included but were not limited to: Leon, Castille, the Basque Territories, and the Catalonian Counties. In addition, the Umayyads were not able to prevent the fragmentation of their territory into the Taifa Kingdoms in 1038.
D. The growing political influence of immigrant groups in the colonies
The United state did not want to be involve in world affair so theyvdecide to not sign the league of nation so stay canbe isolated.