What does Joshua 17:1 mean?

This is the land given to Manasseh, Joseph's oldest son. Makir, Manasseh's firstborn, was the father of Gilead. Because he was a skilled warrior, he got Gilead and Bashan. Joshua 17:1 - Modern Text Bible

(Manasseh's territory is described, starting with Makir, who was known for his strength and got the regions east of the Jordan.)