Duct tape, while not being used or even known during period, is a very handy item... and they would have used it if they'd had it!
- holding armor together
- holding garb together
- holding tents together
- holding just about anything together (but don't expect duct tape to help in (most) relationships.)
"Duct tape is like the Force. It has a light side and a dark side, and it holds the universe together."