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The term four piper, also known as a four stacker, is United States Navy terminology for classes of destroyers with four funnels. These include the classes listed below:
These classes were built for use by the United States Navy during World War I and subsequently "moth-balled". Fifty were loaned, under the Destroyers-for-bases_deal to the United Kingdom when convoy escorts were desperately needed in the early years of World War II.
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