text: Army Aviation Operations
  friendly aircraft should not attempt to evade if maneuver space or aircraft power is inadequate,
  or if evading will result in a tail chase.
  * Threaten. If the threat initiates aggressive action and avoidance or evasion is not an option,
  friendly aircraft should execute appropriate battle drills to orient weapons on the threat. The
  threat may break off and avoid engagement at the appearance of a well-coordinated, formidable
  defense.
  * Engage. If the threat was avoided evaded, or threatened, and the action was found to be
  unsuccessful, friendly aircraft must act immediately to engage and neutralize the threat.