HMCS Cayuga was a Tribal-class destroyer that did three tours in Korean waters during the Korean War.
On one tour, its surgeon was an affable chap named Joseph Cyr, an American, oddly enough, who quickly became a favourite of the entire crew.
When the captain developed an inflamed molar, Cyr told him he didn’t know a lot of dentistry, but he’d give it a shot. He retired to his cabin for a little reading, emerged and pulled the skipper’s tooth with no fuss and no complications afterward.
He took care of all the normal medical problems—cuts, sprains, breaks and minor infections—that occur among any crew at sea.
One time, though, Cayuga was sent to provide gunfire support to a Korean commando raid. When the troops came off, a number of them were wounded, some seriously.