Baasha the son of Ahijah of the house of Issachar conspired against him, and Baasha struck him down at Gibbethon, which belonged to the Philistines, for Nadab and all Israel were laying siege to Gibbethon. Bible other translations

“Gibbethon.” A city on the coastal plain of Israel, a few miles west of Gezer. The importance of that spot is that it is an entry point from the coast into Judah. Baasha may have also been looking for a way to attack the Philistines from the west.

Commentary for: 1 Kings 15:27