A military outpost is a temporary or permanent facility established by a military force to provide defense and support for its operations. The three most common types of military outposts are forts, camps, and bases. A FORT is a defensive structure designed to protect a military force from attack. A CAMP is a temporary or semi-permanent facility used by a military force for training, storage, or other purposes. A BASE is a permanent facility used by a military force for operations, training, or other purposes.