How was Roman Emperor Constantine 1 adoption of Christianity similar to Charles martels victory in the battle of tours?

Both Roman Emperor Constantine I's adoption of Christianity and Charles Martel's victory at the Battle of Tours were pivotal in shaping the religious and cultural landscape of Europe. Constantine's endorsement of Christianity in the early 4th century helped legitimize and spread the faith throughout the Roman Empire, promoting its establishment as a dominant religion. Similarly, Martel's victory in 732 halted the Muslim advance into Western Europe, preserving Christianity's influence in the region. Both events marked crucial turning points that reinforced Christian authority and identity in Europe.