of American naval forces on Lake Champlain during the War of 1812. One of the leading members of "Preble's Boys", a small group of naval officers who served during the First Barbary War, Macdonough's actions during the decisive Battle of Lake Champlain are often cited as a model of tactical preparation and execution. Challenger Expedition , built in 1858, undertook the first global marine research expedition called the Challenger expedition in 1872. To enable her to probe the depths, all but two of Challengers guns had been removed and her spars reduced to make more space available. Laboratories, extra cabins and a special dredging platform were installed. She was loaded with specimen jars, alcohol for preservation of samples, microscopes and chemical apparatus, trawls and dredges, thermometers and water sampling bottles, sounding leads and devices to collect sediment from the sea bed and great lengths of rope with which to suspend the equipment into the ocean depths. In all she was supplied with of Italian hemp for sounding, trawling and dredging. As the first true oceanographic cruise, the Challenger expedition laid the groundwork for an entire academic and research discipline. End of the sail Like most periodic eras the definition is inexact and close enough to serve as a general description. The age of sail runs roughly from the Battle of Lepanto in 1571, the last significant engagement in which oar-propelled galleys played a major role, to the Battle of Hampton Roads in 1862, in which the steam-powered destroyed the sailing ships and , finally culminating with the advance of steam power, rendering sail power obsolete. Submarines The history of submarines covers the historical chronology and facts related to submarines, the ships and boats which operate underwater. The modern underwater boat proposal was made by the Englishman William Bourne who designed a prototype submarine in 1578. Unfortunately for him these ideas never got beyond the planning stage. The first submersible proper to be actually built in modern times was built in 1620 by Cornelius Jacobszoon Drebbel, a Dutchman in the service of James I: it was based on Bourne's design. It was propelled by means of oars. The precise nature of the submarine type is a matter of some controversy; some claim that it was merely a bell towed by a boat. Two improved types were tested in the Thames between 1620 and 1624. In 1900, the U.S. navy was sold