Defensive barrier also named as defensive bastion, defensive defense wall, sand cage, welded gabion box, etc. It is a prefabricated, multi-cellular system, made of zinc coated steel welded mesh and lined with non-woven geo-textile. Units can be extended and joined using the provided joining pins. After extended, it is filled into sand, stone, then defensive barrier like a defence wall or bunker, defensive barrier is widely used for fortification and flood control.