Definition
An abatis is a defensive obstacle constructed from felled trees, with their sharpened branches pointing outwards towards the enemy. It's a type of field fortification used to impede the progress of attackers. It functions similarly to a large, thorny hedge designed to slow down or deter movement. It is distinct from a palisade, which uses upright stakes. Abatis were commonly used in historical warfare around forts or encampments. They presented a physical barrier and created a field of fire for defenders.