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In the 1930s, theUnited States Navy built two classes offlotilla leaders, thePorter class, and theSomers class. Due to the regulations of theLondon Naval Treaty, these 13 ships had a displacement of 1,850 tons, compared to the 1,500 tons of a "standard" destroyer, but they were still classed as destroyers and carried the hull classification of (DD). When the treaty ended with the outbreak ofWorld War II in Europe in 1939, the much largerFletcher class was constructed, making the differentiation irrelevant.

TheAtlanta-class cruisers were also built during World War II to act in part as flotilla leaders, though they were mainly employed as antiaircraft cruisers.

Following the war, destroyer leader (DL) was a newhull classification symbol used by the U.S. Navy from the 1950s until 1975. These ships were more commonly calledfrigates, although they were much larger than frigates of other navies. They were intended to be larger and more capable than destroyers and to lead adestroyer task force.

All but the first five destroyer leaders would be designed as guided missile ships (DLG), and two of the first five would be converted to missile ships.

Eight of these ships would be nuclear powered and hold the hull classification (DLGN).

During the1975 USN ship reclassification these ships were reclassified asguided missile destroyers (DDG) orguided missile cruisers (CG), depending on their size and capabilities; all the nuclear ships would be classed as (CGN). At the same time the smallerdestroyer escorts (DE or DEG) were reclassified as 'frigates' (FF or FFG) and so US terminology was brought into line with that of the other NATO members. The last of the destroyer leaders was decommissioned in 1999. A total of 41 ships bore the DL classification.

•  This article incorporatespublic domain material from theNaval Vessel Register.

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