Jehoash defeats Amaziah
Jehoash king of Israel defeated Amaziah king of Judah at Beth-shemesh.
Key passages
2 Ki 14:11–12

But Amaziah would not listen, so Jehoash king of Israel went up and they met face-to-face, he and Amaziah king of Judah, at Beth-Shemesh which belongs to Judah. Judah was defeated before Israel and they fled, each to his tent.

2 Ch 25:21–22

So Joash the king of Israel went up, and he and Amaziah the king of Judah faced one another at Beth-Shemesh, which belongs to Judah. And Judah was defeated before Israel, and each man fled to his tent.