AUSSIE soldiers played two-up between battles. Now, it is a recreational game played once a year in designated licensed venues across Australia on Anzac Day.
Four venues across the Gladstone Region hosted games of two-up on Friday, with the crowd steadily increasing in the afternoon.
Yaralla Sports Club president Col Connors remembers playing in both Papua New Guinea and Japan.
"Sometimes we just had nothing else to do," he laughed.
It's a game of pure chance that relies on the tossing of a coin.
The game is traditionally played with pennies - their weight, size, and surface design make them ideal for the game.
Two-up is played with two pennies resting on a board, the board is thrown in the air and how the coins fall deciding whether you win or lose.
The person throwing the coins is called the ringer. After all bets have been placed the call of "come in spinner" is made and the coins are tossed.
The outcome decides whether you win or lose. Before the coin is tossed you can bet on heads, tails or odds.
Anzac Day is the only day of the year when playing two-up outside a casino is legal.
Two-up is often considered to be one of Australia's national games.