This Game is meant for Boy Scouts, Webelos scouts.
Decide for yourself if it is appropriate for your younger scouts or not.

deck of cards - enough for each scout to have a card

Shuffle the cards and hand out a card to each scout, telling everyone not to reveal their card to anyone.

Divide the group in half, each half creating a line with the first scout in line facing the other team.

Just like the normal game of War, the first card on each team is revealed. The highest card takes the lower card (and scout) to the end of the highest card's line.

If two cards are equal, a War occurs. The next three scouts in each line step forward but do not reveal their cards. The 4th scout reveals his card and the higher card wins ALL 7 cards over to his team.

Continue on until all cards are on one side or you reach a defined time limit. Keep the turns going as fast as possible to keep the teams moving and engaged.