Judges 10:17

Then the children of Ammon were gathered together
By a crier, as Jarchi; they had passed over Jordan, as in ( Judges 10:9 ) and had been distressing three of the tribes of Israel on that side; but now being informed, by an herald at arms, that the children of Israel, on the other side Jordan, were risen up in defence of their country, rights, and liberties, the children of Ammon came back and crossed over Jordan again:

and encamped in Gilead;
in the land of Gilead, part of which belonged to the tribes of Reuben and Gad, and the other part to the half tribe of Manasseh:

and the children of Israel assembled themselves together, and encamped
at Mizpeh:
of which name there were several cities in the land of Israel, on both sides Jordan; this must design a place on the other side Jordan, either in the tribe of Gad or Manasseh, for it seems there was of this name in each, see ( Genesis 31:49 ) ( Joshua 11:3 ) .