Joshua told the Reubenites, Gadites, and the half tribe of Manasseh:

Then Joshua summoned the Reubenites, Gadites, and the half-tribe of Manasseh

Igal son of Nathan from Zobah, Bani the Gadite,

Then we took their land and gave it as an inheritance to Reuben, Gad, and half the tribe of Manasseh.

This is the land we brought under our control at that time: The territory extending from Aroer ¹  by the Wadi Arnon and half the Gilead hill country with its cities I gave to the Reubenites and Gadites. ² 

To the Reubenites and Gadites I allocated the territory extending from Gilead as far as Wadi Arnon (the exact middle of the wadi was a boundary) all the way to the Wadi Jabbok, the Ammonite border.

These cities are Bezer, in the desert plateau, for the Reubenites; Ramoth in Gilead for the Gadites; and Golan in Bashan for the Manassehites.

Moses the Lord’s servant and the Israelites defeated them and Moses the Lord’s servant assigned their land ¹  to Reuben, Gad, and the half tribe of Manasseh.

The other half of Manasseh, ¹  Reuben, and Gad received their allotted tribal lands beyond the Jordan, ²  just as Moses, the Lord’s servant, had assigned them.

He conquered all the land of Gilead, including the territory of Gad, Reuben, and Manasseh, extending all the way from the Aroer in the Arnon Valley through Gilead to Bashan. ¹ 

From the other side of the Jordan, from Reuben, Gad, and the half tribe of Manasseh, there were 120,000 men armed with all kinds of weapons.

The Reubenites, Gadites, and the half-tribe of Manasseh had 44,760 men in their combined armies, warriors who carried shields and swords, were equipped with bows, and were trained for war. ¹ 

So the God of Israel stirred up ¹  King Pul of Assyria (that is, King Tiglath-pileser of Assyria), ²  and he carried away the Reubenites, Gadites, and half-tribe of Manasseh and took them to Halah, Habor, Hara, and the river of Gozan, where they remain to this very day.

Some of the Gadites joined David at the stronghold in the desert. They were warriors who were trained for battle; they carried shields and spears. They were as fierce as lions and could run as quickly as gazelles across the hills. ¹ 

Jeriah had 2,700 relatives who were respected family leaders. ¹  King David placed them in charge of the Reubenites, the Gadites, and the half-tribe of Manasseh; they took care of all matters pertaining to God and the king. ²