- Period:
- Second World War (1939-1945)
- Rank:
- Captain
- Unit:
- Naval Underwater Group
Citation:
"For extraordinary heroism and distinguished service in the line of his profession as Commander of the Naval Underwater Group, in action on 17 February 1945, during the pre-invasion assault operations against Iwo Jima, in the Volcano Islands. Captain Hanlon's conduct throughout was in keeping with the highest traditions of the Navy of the United States."