Answer:
Leo III initiated Iconoclasm.
Explanation:
Leo III, who founded the Isaurian dynasty in Byzantium durign th 8th century, introduced Iconoclasm which literally means "icon breaking". It is the destruction of icons, including images, statues and monuments, for religious or social reasons.
Leo III prohibited the use of all such icons following the turmoil in Byzantium. He introduced a legislative reform that enabled him to demolish all such images. He may have been influenced by the Islamic Empire to take this decision.
Leo III had accomplished much for the empire which somewhat provided him the confidence to pursue the policy of Iconoclasm. However, this policy led to prolonged conflict in the empire.
Marco Polo was an Italian merchant, explorer, and writer, born in the Republic of Venice. His travels are recorded in Livre des merveilles du monde, a book that described to Europeans the wealth and great size of China, its capital Peking, and other Asian cities and countries
They held wars to make people sacrifice their life to show they may use sacrifice