Let's hear it for some naval exploits!
The idiom, "to turn a blind eye" is rumored to have come from the great British navy commander of all time: Admiral Horatio Nelson. During one navy battle, he was ordered by a higher-up to withdraw his ships and retreat. The order was delivered via flag signals. Admiral Nelson, being the suave, navy mastermind that he was, put his telescope over his blind eye, and uttered the famous words which we now use to refer to an instance when we ignore something critical or important.
And another one!
Whenever the Romans wanted to re-enact their greatest navy exploits, they would fill up the Colosseum with tons of water, enough to keep an entire squadron of ships afloat and shoot at each other with flaming arrows, catapults, and whatever type of weaponry was used during the battle being re-enacted. Re-enactments are supposed to be 'pretend' sessions, but for the Romans, it meant having those "pretend" people die.