A drinking game based on the war of the same name. Similar to beer pong.
Two teams, America and Vietnam, both get 10 cups. America arranges their cups in a triangle (as in beer pong), with the usual amount of beer in them. Vietnam places their cups anywhere they like on their side of the table, but the cups are full.
If America makes a shot, someone on team Vietnam has to drink the whole cup and removes it. If Vietnam makes a shot, someone on team America has to drink the cup and refill it.
The game ends when all cups on the Vietnam side are gone, or when America gives up.
Hey, wanna play beer pong?" "Nah, I got a better game, it's called the Vietnam War."