After World War I, 347 German aircraft were brought to the United States—some were incorporated into the Army Aeronautical Museum (in 1923 the Engineering Division at McCook Field "first collected technical artifacts for preservation"). The training school at Wilbur Wright Field was discontinued. Wilbur Wright Field and the depot merged after World War I to form the Fairfield Air Depot. The Patterson family formed the Dayton Air Service Committee, Inc which held a campaign that raised $425,000 in two days and purchased northeast of Dayton, including Wilbur Wright Field and the Huffman Prairie Flying Field. In 1924, the Committee presented the deeds to president Calvin Coolidge for the construction of a new aviation engineering center. The entire acreage (including the Fairfield Air Depot) was designated Wright Field, which had units such as the Headquarters, 5th Division Air Service (redesignated 5th Division Aviation in 1928), and its 88th Observation Squadron and 7th Photo Section. New facilities were built 1925–27 on the portion of Wright Field west of Huffman Dam to house all of the McCook Field functions being relocated.