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| A tactical subdivision of a larger area, the responsibility for which is assigned to a tactical unit; generally applied to offensive action (JP 3-09) | |||
| zone: 14 phrases in 8 subjects |
| Abbreviation | 6 |
| Geology | 1 |
| Immunology | 1 |
| Information technology | 1 |
| NASA | 1 |
| Oceanography & oceanology | 1 |
| Trademark | 1 |
| United States | 2 |