The men on the other side of the valley - This must mean to the north of the plain of Jezreel, and would comprise the tribe of Naphtali, and Zabulon, and probably Issachar. But the text of 1 Chronicles 10:7 has “that were in the valley,” limiting the statement to the inhabitants of the plain of Jezreel.
On the other side Jordan - This phrase most commonly means on the east of Jordan, the speaker being supposed to be on the west side. But it is also used of the west of Jordan, as here, if the text be sound.
The Philistines ... dwelt in them - One of the principal cities, Beth-shan, fell into their power at once 1 Samuel 31:10.