Military tactics having been revolutionized by modern trench warfare, no time was wasted in the open-country maneuvers formerly employed to accustom the troops to actual field service. The National Army was trained for the single purpose of effective trench fighting. On adjacent hillsides and plains extensive field fortifications were prepared, equipped with barbed-wire entanglements, artillery, and machine-gun emplacements, bomb-proof dugouts, communication trenches, support trenches, listening posts, and every other device which had been evolved from the war operations in Europe. The men were taught how to enter and leave a trench, to repel attacks, make raids in pursuit of information, surprise forays by day or night behind the protection of barrage fire, and how to take care of themselves, repair artillery damage, and reenforce the barbed-wire barriers. The training was intensive and embraced a sixteen weeks' course crowded with manifold detail, which was vigorously observed. More attention was paid in the curriculum to drilling individual men, platoons, and companies than to conducting brigade, divisional, and regimental exercises, these latter being deferred until the smaller units were fit for advanced warfare. The platoon, commanded by a lieutenant, was the fighting unit in trench operations, and upon the lieutenants was therefore imposed the responsibility of training less than company units in order to effect an intimate and sympathetic cooperation between officers and men when they encountered the stern realities of warfare in Europe. Camp conditions formed a chief subject of the Congressional investigation. The War Department had been confronted with the task of providing for a new army which had to be rushed into training, and had to depend upon congested railroad facilities to equip the camps. But everything had been done, Secretary Baker told the committee, to care for the men, and where defects had occurred they were quickly removed. "And where, I want to know, in all history can you find an achievement comparable to that of America's in raising this great army from her citizenry in this period of time?" asked the Secretary of War. "It has never been done before, and it is to America's credit that she has accomplished it in the nine months we have been at war." The outlook, as viewed by Secretary Baker, was that if adequate transport facilities were available, 1,500,000 men could be shipped to France during 1918. He indicated that a third of that number would be on the western front early in the year as a forerunner of the main body.