What caused king jehoshaphat's death?

King Jehoshaphat of Judah died after a reign marked by military alliances and religious reforms. He fell into an ill-fated alliance with King Ahaziah of Israel, which led to a naval expedition that failed. His death is attributed to the natural progression of age and the culmination of his reign, as he passed away peacefully after ruling for 25 years. He was succeeded by his son Jehoram.