2-254. Survivability is a quality or capability of military forces which permits them to avoid or withstand hostile actions or environmental conditions while retaining the ability to fulfill their primary mission (ATP 3-37.34). Survivability operations are those military activities that alter the physical environment to provide or improve cover, camouflage, and concealment (ATP 3-37.34). Survivability operations are critical to offensive, defensive, and stability operations, but they may be emphasized differently in each. Commanders may rely more on mobility and terrain to provide concealment during the offense, while stressing camouflage, survivability positions, and hardened facilities to avoid or withstand hostile actions during the defense.