From Halopedia, the Halo wiki
A combat barrier is a mobile ground barrier used by UNSC infantry forces. They can be deployed and set up relatively quickly to aid the defense of a strategic position.
Combat barriers are placed and situated all around strategic locations as defensive mechanisms against enemy weapons flanking fire. Combat barriers are used to protect soldiers of all types that are located in military bases, dug-in fortifications, and other facilities (such as ships). While many models of combat barrier offer decent protection from plasma and projectile weapons, they do not protect well against the concussive force of an explosion, though they do a good job of absorbing shrapnel and flying debris.
The M72 Mobile Barrier is a principal type of combat barrier used by the UNSC, encompassing the M72-S (small) and M72-L (large) Mobile Barriers. These barriers work by manipulating lines of sight; they have a small slit, opening or corner for someone inside to shoot out of and have full line of fire on his enemies, but the enemies must hit a very small target. Some combat barriers however, lack these slits - combatants using them for protection must stand up or creep out from the side to fire on an enemy, exposing themselves in the process. Beside the more common barriers made of metal, the UNSC also uses large concrete barriers.
Concrete barriers as seen in Halo 3: ODST.
Barriers as seen in Halo 2.
A Halo: Combat Evolved-era barrier.
A player in Halo 3:ODST's firefight taking cover behind a small barrier.
List of appearances
- Halo: Combat Evolved (First appearance)
- Halo 2
- Halo 3
- Halo 3: ODST
- Halo: Reach
- Halo: Combat Evolved Anniversary
- Halo 4
- Halo 2: Anniversary
- Halo: Ground Command
- Halo: Fireteam Raven
- ^ Halo: Combat Evolved, campaign level, Pillar of Autumn
- ^ Halo 2, campaign level, Cairo Station
- ^ Halo 3, campaign level, Crow's Nest
- ^ Spartan Games: Make your Halo table look awesome!
- ^ Halo 3