The report tells of notable achievements in ordnance, especially the work of the 14-inch naval guns on railway mounts on the western front, which hurled shells far behind the German lines, these mounts being designed and completed in four months. The land battery of these naval guns was manned exclusively by bluejackets under command of Rear-Admiral C. P. Plunkett. The work of the Bureau of Ordnance is praised, and Admiral Earle, the Chief of the bureau, is declared "one of the ablest and fittest officers." An account is given of the mine barrage in the North Sea, one of the outstanding anti-submarine offensive projects of the year, thus closing the North Sea, and for which 100,000 mines were manufactured and 85,000 shipped abroad. A special mine-loading plant, with a capacity of more than 1,000 mines a day, was established by the Navy Department. A star shell was developed which, when fired in the vicinity of an enemy fleet, would light it up, make ships visible, and render them easy targets without disclosing the position of our own ships at night. The Bureau of Ordnance, under the direction of Rear-Admiral Earle, is stated to have met and conquered the critical shortage of high explosives which threatened to prolong the time of preparation necessary for America to smash the German military forces; this was done by the invention of TNX, a high explosive, to take the place of TNT, the change being sufficient to increase the available supply of explosives in this country to some 30,000,000 pounds. In the future, it is stated, American dreadnoughts and battle cruisers will be armed with 16-inch guns, making these the heaviest armed vessels in the world. Depth-charges are stated to be the most effective antisubmarine weapons. American vessels were adequately armed with this new weapon. A new type was developed and a new gun, known as the "Y" gun, was designed and built especially for firing depth-charges. THE ACHIEVEMENTS OF THE MARINE CORPS BY JOSEPHUS DANIELS SECRETARY OF THE NAVY The United States Marine Corps, the efficient fighting, building, and landing force of the navy, has won imperishable glory in the fulfilment of its latest duties upon the battlefields of France, where the marines, fighting for the time under General Pershing as a part of the victorious American Army, have written a story of valor and sacrifice that will live in the brightest annals of the war. With heroism that nothing could daunt, the Marine Corps played a vital role in stemming the German rush on Paris, and in later days aided in the beginning of the great offensive, the freeing of Rheims, and participated in the hard fighting in Champagne, which had as its object the throwing back of the Prussian armies in the vicinity of Cambrai and St. Quentin.