Miami-class cutter USCGC Tampa photographed in harbour, prior to the First World War. Completed in 1912 as the U.S. Revenue Cutter Miami, this ship was renamed Tampa in February 1916. On 26 September 1918, while operating in the English Channel, she was torpedoed and sunk by the German Submarine UB-91. All 131 persons on board Tampa were lost with her, the largest loss of life on any U.S. combat vessel during the First World War. Official U.S. Navy photo NH 1226 from the U.S. Navy Naval History and Heritage Command
The latest issue of the US Naval Institute’s Naval History Magazine has a nice summary of the Coast Guard’s First World War experience, written by Coast Guard Atlantic Area’s historian Dr. William H. Thiesen. It is available to anyone on line here.