Emperor Constantine made the religion, Christianity, a new, legal religion in the Roman Empire.
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ANSWER = B
This headdress is made of quetzal bird feathers.
It is called the "Moctezuma" headdress, an Aztec Emperor.
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, Antietam was the bloodiest single-day battle in American history with over 23,000 casualties (men listed as killed, wounded, captured or missing) in roughly 12 hours. The battle ended the Confederate invasion of Maryland in 1862 and resulted in a Union victory.