An incident has occurred that indicates imminent terrorist action falls under which TREATCON condition?

The TREATCON condition that indicates imminent terrorist action is Charlie. This status is specifically designated for situations where there is a credible threat that an attack is imminent or likely to occur.

In TREATCON Charlie, heightened security measures are taken in anticipation of potential terrorist actions. This means that personnel are expected to be more vigilant, and proactive measures are often implemented to mitigate risks. The recognition of this condition helps ensure that all Marines and personnel are prepared to act quickly to protect themselves and others in the event of an attack.

While TREATCON Alpha and Bravo indicate lower levels of threat awareness, they do not convey the same urgency as Charlie. TREATCON Delta signifies that a terrorist action has already occurred or a high probability of such an event is present, which makes Charlie the correct designation for any situation where there is a clear indication of imminent danger.