What does 2 Chronicles 18:3 mean?

Ahab, king of Israel, asked Jehoshaphat, king of Judah, 'Will you go with me to fight at Ramoth-gilead?' Jehoshaphat answered, 'I’m with you all the way. My people are your people. We’ll fight together.' 2 Chronicles 18:3 - Modern Text Bible

(Jehoshaphat agreed to support Ahab, showing unity and loyalty between the two kingdoms.)