And Baasha the son of Ahijah, of the house of Issachar, conspired against him; and Baasha smote him at Gibbethon, which belonged to the Philistines; for Nadab and all Israel laid siege to Gibbethon. (1 Kings 15:27)
This was a Levitical town in the territory originally assigned to Dan (Joshua 19:44; 21:23). It was in the Shephelah (see on Joshua 19:44). Many towns in this border area frequently changed hands between the Hebrews and the Philistines. The town was now in the hands of the Philistines, and 24 years later it was still held by them (1 Kings 16:15).
Of Issachar.
Baasha sprang from an obscure tribe, hardly distinguished at any time in Hebrew history.