On April 11, 1900, the U.S. Navy acquired its first submarine, a 53-foot craft designed by Irish immigrant John P. Holland. Propelled by gasoline while on the surface and by electricity when submerged, the Holland served as a blueprint for modern submarine design. By the eve of World War I, Holland and Holland-inspired vessels were a part of large naval fleets throughout the world.(from the Library of Congress' American Memory page for April 11)
May the upcoming year be better for the Submarine Force - and for all the Armed Services - than the last one.