1 plastic bottle, piece of lumber, or safe item to stand on end for each scout.
a dozen or so stones for each scout.

This game gives larger patrols an advantage, but other patrols can even the odds through cooperation.

Each patrol stands up a bottle representing each scout in a line. This should create a long line of bottles with a bit of space between each grouping.
All scouts take position on the firing line about 10 or 20 yards from the bottles.
On the 'FIRE' signal, everyone throws stones trying to knock down bottles representing scouts in other patrols. When a bottle is knocked down, a member from that patrol must step away from the firing line and sit down - killed in action. But, he can leave his stones for remaining teammates.

The last patrol with bottles standing wins. Or, the most bottles left when all stones are thrown.

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After playing once or twice, patrols may form alliances to take out the best patrol early. Other strategies may be used as well.