25. The plan suggested for the American participation in these operations was not acceptable to me because it would require the immediate separation of the recently formed First American Army into several groups, mainly to assist French armies. This was directly contrary to the principle of forming a distinct American Army, for which my contention had been insistent. An enormous amount of preparation had already been made in construction of roads, railroads, regulating stations, and other installations looking to the use and supply of our armies on a particular front. The inherent disinclination of our troops to serve under allied commanders would have grown and American morale would have suffered. My position was stated quite clearly that the strategical employment of the First Army as a unit would be undertaken where desired, but its disruption to carry out these proposals would not be entertained.
A further conference at Marshal Foch’s headquarters was held on September 2, at which Gen. Petain was present. After discussion the question of employing the American Army as a unit was conceded. The essentials of the strategical decision previously arrived at provided that the advantageous situation of the Allies should be exploited to the utmost by vigorously continuing the general battle and extending it eastward to the Meuse. All the Allied armies were to be employed in a converging action. The British armies, supported by the left of the French armies, were to pursue the attack in the direction of Cambrai; the center of the French armies, west of Rheims, would continue the actions, already begun, to drive the enemy beyond the Aisne; and the American Army, supported by the right of the French armies, would direct its attack on Sedan and Mezieres.
It should be recorded that although this general offensive was fully outlined at the conference no one present expressed the opinion that the final victory could be won in 1918. In fact, it was believed by the French high command that the Meuse-Argonne attack could not be pushed much beyond Montfaucon before the arrival of winter would force a cessation of operations.
26. The choice between the two sectors, that east of the Aisne including the Argonne Forest, or the Champagne sector, was left to me. In my opinion, no other Allied troops had the morale or the offensive spirit to overcome successfully the difficulties to be met in the Meuse-Argonne sector and our plans and installations had been prepared for an expansion of operations in that direction. So the Meuse-Argonne front was chosen. The entire sector of 150 kilometers of front, extending from Port-sur-Seille, east of the Moselle, west to include the Argonne Forest, was accordingly placed under my command, including all French divisions then in that zone. The First American Army was to proceed with the St. Mihiel operation, after which the operation between the Meuse and the western edge of the Argonne Forest was to be prepared and launched not later than September 25.
As a result of these decisions, the depth of the St. Mihiel operation was limited to the line Vigneulles-Thiaucourt-Regnieville. The number of divisions to be used was reduced and the time shortened. Eighteen to 19 divisions were to be in the front line. There were 4 French and 15 American divisions available, 6 of which would be in reserve, while the two flank divisions of the front line were not to advance. Furthermore, 2 Army Corps headquarters, with their corps troops, practically all the Army artillery and aviation, and the First, Second, and Fourth Divisions, the first two destined to take a leading part in the St. Mihiel attack, were all due to be withdrawn and started for the Meuse-Argonne by the fourth day of the battle.
27. The salient had been held by the Germans since September, 1914. It covered the most sensitive section of the enemy’s position on the Western Front; namely, the Mezieres-Sedan-Metz Railroad and the Briey-Iron Basin; it threatened the entire region between Verdun and Nancy, and interrupted the main rail line from Paris to the east. Its primary strength lay in the natural defensive features of the terrain itself. The western face of the salient extended along the rugged, heavily wooded eastern heights of the Meuse; the southern face followed the heights of the Meuse for 8 kilometers to the east and then crossed the plain of the Woevre, including within the German lines the detached heights of Loupmont and Montsec which dominated the plain and afforded the enemy unusual facilities for observation. The enemy had reinforced the positions by every artificial means during a period of four years.
28. On the night of September 11, the troops of the First Army were deployed in position. On the southern face of the salient was the First Corps, Maj. Gen. Liggett, commanding, with the Eighty-second, Ninetieth, Fifth, and Second Divisions in line, extending from the Moselle westward. On its left was the Fourth Corps, Maj. Gen. Joseph T. Dickman, commanding, with the Eighty-ninth, Forty-second, and First Divisions, the left of this corps being opposite Montsec. These two Army Corps were to deliver the principal attack, the line pivoting on the center division of the First Corps. The First Division on the left of the Fourth Corps was charged with the double mission of covering its own flank while advancing some 20 kilometers due north toward the heart of the salient, where it was to make contact with the troops of the Fifth Corps. On the western face of the salient lay the Fifth Corps, Maj. Gen. George H. Cameron, commanding, with the Twenty-sixth Division, Fifteenth French Colonial Division, and the Fourth Division in line, from Mouilly west to Les Eparges and north to Watronville. Of these three divisions, the Twenty-sixth alone was to make a deep advance directed southeast toward Vigneulles. The French Division was to make a short progression to the edge of the heights in order to cover the left of the Twenty-sixth. The Fourth Division was not to advance. In the center, between our Fourth and Fifth Army Corps, was the Second French Colonial Corps, Maj. Gen. E. J. Blondlat, commanding, covering a front of 40 kilometers with 3 small French divisions. These troops were to follow up the retirement of the enemy from the tip of the salient.
The French independent air force was at my disposal which, together with the British bombing squadrons and our own air forces, gave us the largest assembly of aviation that had ever been engaged in one operation. Our heavy guns were able to reach Metz and to interfere seriously with German rail movements.
At dawn on September 12, after four hours of violent artillery fire of preparation, and accompanied by small tanks, the infantry of the First and Fourth Corps advanced. The infantry of the Fifth Corps commenced its advance at 8 a. m. The operation was carried out with entire precision. Just after daylight on September 13, elements of the First and Twenty-sixth Divisions made a junction near Hattonchatel and Vigneulles, 18 kilometers northeast of St. Mihiel. The rapidity with which our divisions advanced overwhelmed the enemy, and all objectives were reached by the afternoon of September 13. The enemy had apparently started to withdraw some of his troops from the tip of the salient on the eve of our attack, but had been unable to carry it through. We captured nearly 16,000 prisoners, 443 guns, and large stores of material and supplies. The energy and swiftness with which the operation was carried out enabled us to smother opposition to such an extent that we suffered less than 7,000 casualties during the actual period of the advance.
During the next two days the right of our line west of the Moselle River was advanced beyond the objectives laid down in the original orders. This completed the operation for the time being and the line was stabilized to be held by the smallest practical force.
29. The material results of the victory achieved were very important. An American Army was an established fact, and the enemy had felt its power. No form of propaganda could overcome the depressing effect on the morale of the enemy of this demonstration of our ability to organize a large American force and drive it successfully through his defenses. It gave our troops implicit confidence in their superiority and raised their morale to the highest pitch. For the first time wire entanglements ceased to be regarded as impassable barriers and open-warfare training, which had been so urgently insisted upon, proved to be the correct doctrine. Our divisions concluded the attack with such small losses and in such high spirits that without the usual rest they were immediately available for employment in heavy fighting in a new theater of operations. The strength of the First Army in this battle totaled approximately 500,000 men, of whom about 70,000 were French.
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