protective screen used to protect a soldier or worker from enemy fire

A moveable plate or shield that protects those operating a gun, engaged in seige work or other activities. On cannons, the mantlet was made of rope to protect the gun handlers from flying debris such as splinters and shrapnel. The top illustration shows a mantlet that can be wheeled around for protection of seige workers. The photo of the tank gun barrel has the mantlet highlighted in red.

See Mantelet.

portable bulletproof shelter

Detached fortification preventing direct access to a gateway; low outer wall.