Tug of War
Tug of war is a classic game of strength. Whether it's a camp of Army soldiers in training or a dozen 6-year-olds at a birthday party, the rules and objective are the same. Two teams of equal size pull each end of a rope until one side manages to drag the opposing team across the marker line. The Army often uses mud pits, but this isn't necessary with younger children. There are a few safety rules to follow, however. For instance, the rope must made of natural manila, which has the least chance of recoiling and springing back. Also, children should never wrap the rope around their hands or arms to get a better grip. Like many physical activities involving kids, tug of war is a game that should only take place under adult supervision.
Obstacle Course
One of the standard training exercises for soldiers in boot camp is the obstacle course. Although the real thing involves rigorous physical activity and large amounts of land, obstacle courses suitable for kids can easily be constructed in the back yard. Here, children can get the exercise they need while trying to beat each other's fastest times. Ideas for backyard obstacle courses include using hula hoops to squirm in and out of and lawn chairs to crawl under soldier-style. What's great about this game is that the courses can be rearranged in multiple ways, under parental supervision, of course.
Water Weapons Battle
One of the safest ways for children to reenact an Army battle just also happens to be an ideal activity for a hot summer day, as "battles" involve the use of such "weapons" as water-soaker guns and water grenade balloons. Any back yard with an open field of grass can be turned into a battleground, and kids can work together, developing strategies and attacks, to soak the other team as much as possible. Since the only ammo is water, it turns the battle into harmless afternoon fun, perfect for a party full of children.
Capture the Flag
Capture the flag has been a playground favorite for decades. While it can be played in any setting, the game lends itself particularly well to an Army-themed party. The game involves two teams, each guarding a flag that rests in its territory. The objective is for one team to grab the other team's flag and safely return it to its own side. When a team member works his way into opposing territory, that player runs the risk of being tagged and, therefore, put out of the game. At a party, kids can dress up in Army uniforms and camouflage, adding even more intensity to the game as they plan and execute their attacks.