The 5th American Corps, composed of the 26th and 4th Divisions under Major-General George H. Cameron, and supported by the French 15th Division, carried out a secondary attack from Mouilly to Watronville, the objectives being, first the capture of the crests of Eparges and Combres, then the Combres-Vigneulles line. The Corps was to join hands in the latter village with the troops engaged in the main attack. The French 2nd Colonial Corps, first under General Blondlat and afterwards General Claudel, operated in the centre of the salient, from Xivray to Mouilly, with orders to protect the flanks of the two American attacks. The attacking forces consisted of some 216,000 Americans and 48,000 French, in addition to the American Reserves (190,000 men), who were ready at a moment’s notice to take part in the battle. In his official report General Pershing stated that he had mustered a body of troops three times as large as General Grant’s Army of the Potomac in 1864–1865. [Illustration: SHOWING THE AMERICAN-FRENCH ADVANCE FROM SEPT. 12 (12/9) TO NOV. 11 (11/11), 1918 _Two secondary attacks on Sept. 12 held the enemy at the bottom of the salient, while the main attacks on the flanks crushed in the latter, as in the jaws of a vise. On Sept. 13, the Germans, in danger of being cut off, were forced to evacuate the salient._] Flattening out the Salient, Sept. 12, 1918 (_See map above._) Despite all the precautions taken by General Pershing to ensure the secrecy of his troops’ movements in the St. Mihiel sector, the Germans expected the attack, and as early as the beginning of September began to withdraw their heavy guns, and to make active preparations for the total evacuation of the salient. However, General Pershing did not give them time to do this, and ordered the attack to be made on September 12, at 5 a.m. for the 1st and 4th Corps, and at 8 a.m. for the 5th Corps. The attack had been worked out in minute detail, and the time-table of the advance exactly laid down. Everything took place as arranged. After an artillery preparation lasting four hours, the American divisions advanced, supported by a certain number of tanks, half of them driven by Americans and the other half by Frenchmen. Accompanied by soldiers whose duty it was to cut the barbed wire, and by men armed with “bangalore torpedoes,” the Americans advanced in successive waves. They soon reached the enemy trenches and fell unexpectedly on the demoralized foe in the middle of a fog.