There were six classes of “1000-tonners”: the four-ship Cassin and Aylwin classes funded in 1912, and the O’Brien, Tucker and Sampson classes funded in 1913–15 (6 ships each). All

1000-ton class leaders Cassin (top) and Sampson).

these ships were “broken-deckers” with high foc’sles. They mounted eight 18-inch or 21-inch torpedo tubes on hulls 305–315 feet in length. Their main gun batteries were four 4-inch/50 .cal guns; complement was up to nearly 100.
   Commissioned in 1913–17, the 1000-tonners were the most modern destroyers in the US Navy when it entered World War I on 6 April 1917. Within a month, the first squadron of six ships arrived at Queenstown, Ireland, where it immediately joined British destroyers, trawlers, yachts and other craft in anti-submarine patrols and rescue operations. A later arrival, Jacob Jones, became the only US destroyer lost to U-boat attack during the war after achieving a fine record in this service.
   One ship, Allen (DD 66) was recommissioned in 1940 and served in the Pacific through World War II.