 Manasseh was a member of the Northern Kingdom until the kingdom was conquered by Assyria in c. 723 BC and the population deported.From that time, the Tribe of Manasseh has been counted as one of the Ten Lost Tribes of Israel, though some groups claim descent from the tribe.The Bible records that following the completion of the conquest of Canaan by the Israelite tribes, Joshua allocated the land among the twelve tribes.