The attrition warfare now caught up to both sides. Germany had used up all the best soldiers they had, and still had not conquered much territory. The British were out of fresh manpower but still had huge reserves from the British Empire, whereas the French nearly exhausted their manpower. Berlin had calculated it would take months for the Americans to ship all their men and supplies—but the U.S. troops arrived much sooner, as they left their supplies behind, and relied on British and French artillery, tanks, airplanes, trucks and equipment. Berlin also assumed that Americans were fat, undisciplined and unaccustomed to hardship and severe fighting. They soon realized their mistake. The Germans reported that "The qualities of the individually may be described as remarkable. They are physically well set up, their attitude is good... They lack at present only training and experience to make formidable adversaries. The men are in fine spirits and are filled with naive assurance."