Reference

Joshua 4:12

And the children of Reuben, and the children of Gad, and half the tribe of Manasseh, passed over armed before the children of Israel, as Moses spake unto them:
10

For the priests which bare the ark stood in the midst of Jordan, until every thing was finished that the Lord commanded Joshua to speak unto the people, according to all that Moses commanded Joshua: and the people hasted and passed over.

11

And it came to pass, when all the people were clean passed over, that the ark of the Lord passed over, and the priests, in the presence of the people.

12

And the children of Reuben, and the children of Gad, and half the tribe of Manasseh, passed over armed before the children of Israel, as Moses spake unto them:

13

About forty thousand prepared for war passed over before the Lord unto battle, to the plains of Jericho.

14

On that day the Lord magnified Joshua in the sight of all Israel; and they feared him, as they feared Moses, all the days of his life.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Israel-Specific Promises

This verse describes the fulfillment of a prior agreement made by Moses with the Transjordanian tribes, not a new promise or prophecy being made to Israel in this context. It's about their obligation to assist in the conquest, not a promise of land or nationhood.