And he said unto Jehoshaphat, Wilt thou go with me to battle to Ramothgilead? And Jehoshaphat said to the king of Israel, I am as thou art, my people as thy people, my horses as thy horses. (1 Kings 22:4)
Jehoshaphat was already in alliance with Ahab, this alliance having been formed by the marriage of Ahab’s daughter Athaliah to Jehoshaphat’s son and heir, Jehoram (2 Kings 8:18, 27). Since Ahaziah, the son of this union, was 22 years old at the time of his accession (2 Kings 8:26), the alliance must have been in existence for some time. The fact that the kings succeeding Jehoshaphat in Judah are Jehoram and Ahaziah (2 Kings 8:16, 25), and that Ahab’s two sons who succeeded him on the throne were named Ahaziah and Joram (1 Kings 22:40; 2 Kings 1:17; 3:1), is a further indication of the friendship existing between the two royal houses at this time.
My horses.
Judah as well as Israel seems to have had an army equipped with both cavalry and chariots. Jehoshaphat was a strong military leader, feared and respected by the nations about (2 Chron. 17:10-19).