Two American divisions operating with the British forces at the end of September and early in October held the place of honor in the offensive that smashed the Hindenburg line, which had been considered impregnable, at the village of St. Vendhuile. In the face of the fiercest artillery and machine gun fire these troops, supported by the British, broke through, held on and carried forward the advance, capturing many prisoners. Two other divisions, assisting the French at Rheims in October, one of them under fire for the first time, conquered complicated defense works, repulsed heavy counter attacks, swept back the enemy’s persistent defense, took positions the Germans had held since 1914 and drove them behind the Aisne river. The battle of St. Mihiel was a prelude to the Meuse-Argonne offensive and was undertaken in order to free the American right flank from danger. Its success enabled General Pershing to begin preparations at once for the famous movement that, more than any other single factor, brought the war to its sudden end. No military forces had ever before tackled the Argonne Forest. French officers did not believe it could be taken. With the exception of St. Mihiel, the German front line, from Switzerland to a point a little east of Rheims, was still intact. The purpose of the American offensive was to cut the enemy’s lines of communication by the railroads passing through Mézières and Sedan and thus strangle his armies. The attack began on September 26 and continued through three phases until the signing of the armistice. Twenty-one American divisions were engaged in it, of which two had never before been under fire and three others had barely been in touch with the front, but of these their commander said that they quickly became as good as the best. Eight of the divisions were returned to the front for second participation, after only a few days rest at the rear. In all, forty German divisions were used against the American advance, among them being many picked regiments, the best the German army contained, seasoned fighters who had been in the war from the start. They brought to the defense of their important stronghold an enormous accumulation of artillery and machine guns and the knowledge that they must repulse the offensive and save their communications or give up their entire purpose and confess themselves beaten. German troops did no more desperate and determined fighting in the war than in this engagement. [Illustration: MOBILE KITCHEN BACK OF THE FRONT LINES] [Illustration: AN AMERICAN BIG GUN IN FRANCE]