: 0 -ONE MILLION SHELLSFIRED IN FOUR HOURSr . .........The most intense concentration of artillery fire ever recorded was that of the* American troops in the battle of St. Miliiel, fought from September« f •12 to 15 and which was the first distinctly American offensive of the war. It was fought chiefly by American troops and wholly under the orders of American officers. In this battle the American artillery fired more than one million shells in four hours.Two comparisons with Gettysburg emphasize the magnitude of the St. Mihiel operation. At St. Mihiel, 550,000 Americans were engaged; at Gettysburg the Union troops numbered approximately 100,000. In three days at * *•**#,Gettysburg the Union artillery fired33,000 shells. The St. Mihiel offensive• * r . •cost the Americans about 7000 casualties, less thari one-third the Union los^. . /ses at Gettysburg. . .