Final answer:
The Second Iconoclasm was a period of controversy and debate over the use of icons in the Byzantine Empire from 815 to 843. Emperor Leo V banned images in 815, attributing military losses to God's displeasure with icons. This second phase of Iconoclasm was generally less severe than the first.
Step-by-step explanation:
The second phase of Iconoclasm, also known as the Second Iconoclasm, occurred from 815 to 843 in the Byzantine Empire. It was a period of controversy and debate over the use of religious images, particularly icons. The ban on images was initiated by Emperor Leo V in 815, who saw the military losses to the Bulgars as a sign of God's displeasure with icons. However, this second phase of Iconoclasm was generally milder compared to the first phase.