How did the crusades give kings more power?

The Crusades allowed kings to consolidate power by uniting their realms under a common religious cause, fostering a sense of loyalty among their subjects. They also gained financial resources through taxation and the sale of indulgences to fund military campaigns, enhancing their coffers. Additionally, many nobles who participated in the Crusades either died or lost their lands, enabling kings to reclaim and centralize authority over these territories. Ultimately, the Crusades shifted political power towards the monarchy as kings emerged as key leaders in the pursuit of religious and territorial goals.