Know Before You Go

Artillery: mounted projectile-firing guns or missile launchers, mobile or stationary, light or heavy, as distinguished from small arms.

Bastion: a projecting portion of a rampart or fortification that forms an irregular pentagon attached at the base to the main work.

Battery: a parapet or fortification equipped with artillery.

Bunker: a fortification set mostly below the surface of the ground with overhead protection provided by logs and earth or by concrete and fitted with openings through which guns may be fired.

Embrasure: an opening, as a loophole or crenel, through which projectiles may be discharged.

Escarp: the inner slope or wall of the ditch surrounding a rampart.

Escarpment: ground cut into an escarp around a fortification or defensive position.

Fort: a strong or fortified place occupied by troops and usually surrounded by walls, ditches, and other defensive works; a fortress; fortification.

Mortars: a cannon very short in proportion to its bore, for throwing shells at high angles.

Palisade: any of a number of pales or stakes pointed at the top and set firmly in the ground in a close row with others to form a defense.

Parapet/Redoubt: a defensive wall or elevation, as of earth or stone, in a fortification.

Tenaille: a low outwork in the main ditch between two bastions