Diplomacy ultimately freed the crew of the USS Pueblo, but as formerly classified documents show, in the first days of the crisis it was the military that was called upon to respond. Naval power would have played an important role in any immediate attempts to force Pyongyang to release the crew and ship.
Naval War College Review: Vol. 54
, Article 10.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol54/iss2/10