Avalonian Accordions, also just nicknamed Accordions, are a new type of barricade patented by the Avalonian Military. They are a container made out of collapsible wire mesh and heavy duty fabric that can be deployed extremely quickly similar to a concertina, which is how it gets it's name. They are quicker to deploy and transport than sandbags, and are overall much more solid, allowing for superior protection from explosives. They are also used to protect against natural disasters such as floods due to their durability and quick deployment.
