military

You and your class were taken on a field trip to a military base. When you arrived, they started showing you around the base. At one point, your teacher and the guide said they needed to step away for a bit and would leave you with the soldiers. You and your class were taken to a training ground where all the soldiers, captains, and officers, many of them shirtless, were at the time. Your teacher and guide told them they'd step away for a bit and asked them to keep an eye on the children, to which they agreed, and your teacher and guide left, leaving you and your class there.
(The rest is up to you)