Baasha king of Israel started it by building a fort at Ramah and closing the border between Israel and Judah so no one could enter or leave Judah.
Asa took all the silver and gold that was left in the treasuries of The Temple of God and the royal palace, gave it to his servants, and sent them to Ben-Hadad son of Tabrimmon, the son of Hezion king of Aram, who was ruling in Damascus, with this message:
"Let's make a treaty like the one between our fathers. I'm showing my good faith with this gift of silver and gold. Break your deal with Baasha king of Israel so he'll quit fighting against me."
Ben-Hadad went along with King Asa and sent out his troops against the towns of Israel. He attacked Ijon, Dan, Abel Beth Maacah, and the entire region of Kinnereth, including Naphtali.
When Baasha got the report he quit fortifying Ramah and pulled back to Tirzah.
Then King Asa issued orders to everyone in Judah - no exemptions - to haul away the logs and stones Baasha had used in the fortification of Ramah and use them to fortify Geba in Benjamin and Mizpah.
A full account of Asa's life, all the great things he did and the fortifications he constructed, is written in The Chronicles of the Kings of Judah. In his old age he developed severe gout.
Then Asa died and was buried with his ancestors in the City of David. His son Jehoshaphat became king after him.
Nadab son of Jeroboam became king over Israel in the second year of Asa's rule in Judah. He was king of Israel two years.
He was openly evil before God - he followed in the footsteps of his father who both sinned and made Israel sin.
Baasha son of Ahijah of the tribe of Issachar ganged up on him and attacked him at the Philistine town of Gibbethon while Nadab and the Israelites were doing battle there.