Carey took the detachment in hand and led it in a series of attacks and counterattacks which left no time for sleeping and little for eating. He gave neither his men nor the enemy a rest, attacking first on the north, then in the centre, then on the south--harassing the enemy unceasingly with the idea of convincing the Germans that a large force opposed them. Whenever the Germans tried to feel him out with an attack at one point, Carey parried with a thrust somewhere else, even if it took his last available man, and threw the Germans on the defensive. The spirit of Carey's troops was wonderful. The work they did was almost super-natural. It would have been impossible with any body of men not physical giants, but the Americans and Canadians gloried in it. They crammed every hour of the day full of fighting. It was a constantly changing battle, kaleidoscopic, free-for-all, catch-as-catch-can. The Germans gained ground. Carey and his men were back at them, hungry for more punishment. At the end of the sixth day, dog-tired and battle-worn, but still full of fight, the detachment was relieved by a fresh battalion which had come up from the rear. STAFF CHANGES Major Gen. James W. McAndrew, it was announced on May 3, was appointed Chief of Staff of the American expeditionary force in succession to Brig. Gen. James G. Harbord, who was assigned to a command in the field. Other changes on General Pershing's staff included the appointment of Lieut. Col. Robert C. Davis as Adjutant General, and Colonel Merritte W. Ireland as Surgeon General. The General Staff of the American expeditionary forces in France, as the result of several changes in personnel, consisted on May 14, 1918, of the following: Commander: General John J. Pershing Aid de Camp: Colonel James L. Collins Aid de Camp: Colonel Carl Boyd Aid de Camp: Colonel M. C. Shallenberger Chief of Staff: Major Gen. J. W. McAndrew Adjutant: Lieut. Col. Robert C. Davis Inspector: Brig. Gen. Andre W. Brewster Judge Advocate: Brig. Gen. Walter A. Bethel Quartermaster: Brig. Gen. Harry L. Rogers Surgeon: Colonel Merritte W. Ireland Engineer: Brig. Gen. Harry Taylor Ordnance Officer: Brig. Gen. C. B. Wheeler Signal Officer: Brig. Gen. Edgar Russell Aviation Officer: Brig. Gen. B. D. Foulois President Wilson on May 4 pardoned two soldiers of the American expeditionary force who had been condemned to death by a military court-martial in France for sleeping on sentry duty and commuted to nominal prison terms the death sentences imposed on two others for disobeying orders. HEALTH OF THE SOLDIERS Major Hugh H. Young, director of the work of dealing with communicable blood diseases in our army in France, made this striking statement on May 12 regarding the freedom of the American expeditionary force from such diseases: