United States Department of Defense

The United States Department of Defense is like the boss of the army, navy, air force, and other military groups that keep the country safe. They have a lot of important jobs, like making sure our troops have the equipment they need, planning what they will do in different situations, and figuring out how to keep us safe from other countries that might want to hurt us. They also work with other countries to try and keep peace around the world. It's a big job, but they take it very seriously!