The town of Rothenburg ob der Tauber in Germany: One of the countries oldest and most preserved cities.

Essentially during the 30 years war, the catholic army wanted to destroy the town because they resisted the church. Count Von Tilly (sounds like a Monty Python name) was going to destroy the town, but as a gesture of peace the town offered him a Mass (3.25 L) of local wine. He declared that if anyone in the town could drink the Mass of wine in one go, he would spare the town and move on. Then someone just walked up and did it. So the army left.

Much much later during world war 2, when the US was performing air raids, someone in the White House knew of this town and pleaded that we do not destroy it. So it has been saved from 2 wars all because one guy chugged a bunch of wine.