In April, 1915, through the efforts of A. Piatt Andrew, who had then become Inspector of the Field Service, the French authorities made a place for American Ambulance Sections at the front on trial. A squad of ten ambulances was sent to the Vosges, and this group attracted the attention of their commanding officers, who asked that it be increased by ten cars so as to form it into an independent Sanitary Section. As soon as this was done, the unit took its place in conjunction with a French Section in an important Sector on the front in Alsace. With this initial success a new order of things began, and in the same month a second Section of twenty cars was formed and was stationed, again in conjunction with an existing French service, in the much-bombarded town of Pont-à-Mousson. In the meantime, two squads of five cars each had been working at Dunkirk. These were now re-enforced by ten more and the whole Section was then moved to the French front in Belgium, with the result that at the end of the month of April, 1915, the Field Service of the American Ambulance had really come into existence. It comprised three Sections of twenty ambulances, a staff car, and a supply car--Section Sanitaire Américaine N{o} 1, as it was called, stationed at Dunkirk; Section Sanitaire Américaine N{o} 2, stationed in Lorraine; and Section Sanitaire Américaine N{o} 3, in the Vosges. The story of the next year is one of real achievement, in which the three Sections emerged from the test with a record of having fulfilled the highest expectations of proving their utility to France. Section 1, having given an excellent account of itself in the long-range bombardments and air-raids at Dunkirk, was rewarded by being intrusted with important work in Belgium at Coxyde, Nieuport, Poperinghe, Elverdinghe, Crombeke, and other _postes de secours_ in that Sector of the French front. Section 2 had to win recognition in a region already served by a French Sanitary Service and to which it was attached to do secondary work. The Section not only accomplished its own work, but made it possible for the French Section to be withdrawn, taking over the _postes de secours_ on the line, and finally becoming independently responsible for an area renowned for its continual heavy fighting. The record of Section 3 is slightly different. It first successfully took over the existing service, and then, pushing on, opened up to motor transport hitherto inaccessible mountain _postes de secours_. With the three Sections thus established, it is interesting to note why they have been a recognized success so shortly after their possible usefulness was appreciated.