How did Charlemagne gained support for his conquest of empire?

Charlemagne gained support for his conquests through a combination of military prowess, strategic alliances, and religious endorsement. He strengthened his position by establishing relationships with the Church, which legitimized his rule and rallied Christian support for his campaigns. Additionally, Charlemagne integrated local leaders into his administration, offering them protection and benefits in exchange for loyalty. His ability to unite diverse tribes under a common Christian identity further solidified his power and facilitated the expansion of his empire.