OAKOC, is an abbreviation in the united states military (army), which means
Observation
avenues of approach
key terrain
obstacles
cover of concealment
OAKOC
OAKOC
OAKOC
Observation and fields of fireAvenues of approachKey terrainObstacles and movementCover and concealmentHope that helped.
Observation and Fields of fire, Avenues of approach, Key terrain, Obstacles and movement, Cover and concealment