### Instruction:
List down some points about military base from the given passage.

### Input:
A military base is a facility directly owned and operated by or for the military or one of its branches that shelters military equipment and personnel, and facilitates training and operations. A military base always provides accommodations for one or more units, but it may also be used as a command center, training ground or proving ground. In most cases, military bases rely on outside help to operate. However, certain complex bases are able to endure on their own for long periods because they are able to provide food, water and other necessities for their inhabitants while under siege. Bases for military aviation are called military air bases, or simply "air bases". Bases for military ships are called naval bases.

### Response:
1. A military base is a structure that is directly owned and run by or for the military or one of its branches, houses military people and equipment, and aids in operations and training.
2. A military base may serve as a command post, a training area, or a proving ground in addition to housing one or more units.
3. Military bases typically rely on outside assistance to function.
4. However, some sophisticated bases can survive on their own for extended periods of time because they can supply their residents with food, water, and other essentials even when they are under attack.
5. Military air bases, or simply "air bases," are bases for military aviation.
6. Naval bases are bases for military ships.