Fifth dimension operations
The fifth dimension of warfare complements the four classical dimensions: land, sea, air, and space. It was enunciated in 1995 as information operations.
This is part of core U.S. military doctrine, that recognizes at least five dimensions, or "domains of warfare" for which it is responsible:
- Land
- Sea
- Air
- Space
- Information
The origin of the concept of fifth dimension operations was a criticism that the "domain approach" reflected "a failure to think beyond the normal 'four' dimensions of threats, both domestic and international".