The Bagley class of destroyers was built by the United States. All eight ships were ordered and laid down in 1935 and subsequently completed in 1937. Their layout was based upon the Gridley-class destroyer design, but they retained the power plants of the Mahan-class destroyers, and thus had a lesser speed than the Gridleys. The Bagley class destroyers were readily distinguished visually by the external trunking of their boiler uptakes around their single stack.