The Army Air Forces in World War II, Vol. 1 (archived PDF)

D E F E N S E O F T H E W E S T E R N H E M I S P H E R E
the First Air Force took over responsibility for defense operations
along the entire extent of the Atlantic coast. This arrangement lasted
until the fall of 1943, when the danger of air attack had greatly de-
creased and the First and Fourth Air Forces were reassigned to the
AAF.14‘ Much earlier-in March I 942-the Eastern Defense Command
had ceased to be a theater of operation^.^^'
Although the actual direction of air defense operations was thus
assigned to the theater commands, the AAF retained vital responsibili-
ties for training and experimental development. In the reorganization
of the W a r Department in March 1942, the reconstituted AAF staff
included a director of Air Defense.143T o this post was assigned Col.
Gordon P. Saville, whose energy and vision had been in large part
responsible for the rapid progress made in 1941 toward the creation
of an aircraft warning service. His experience in the experimental
work of the Air Defense Command and firsthand observation of the
operation of British defenses had convinced him that progress in the
development of an American defense depended on indoctrination of
key personnel in the latest techniques of controlled interception.
Accordingly, he secured the establishment (March 1942) of the Air
Defense Operational Training Unit, later renamed the Fighter Com-
mand School. This unit set up in Florida an ideal air defense net based
on the British system, using VHF radio and modern radar equip-
ment.144T h e R A F sent skilled officers and technicians to act in an
advisory capacity, but care was taken to adjust tactical procedures to
American usages. In addition to indoctrinating command and staff
members in the latest defense methods, the school trained radar units
and tested equipment. Its responsibilities included study of the tactical
and materiel requirements of overseas commands as well as the de-
mands of continental defense. At the expense of existing task forces,
the few specialists available were held for training of the large number
of technicians that would be required for later
T h e organizational adjustments directed on 30 December I 941 had
been accomplished by the end of February 1942, and thereafter the
pattern of continental air defenses became increasingly clear. Along
the Pacific coast from Canada to Mexico a “vital air defense zone” of
approximately I 50 miles depth and extending 2 0 0 miles seaward was
created by the Western Defense Command, and a similar zone along
the Atlantic coast was established by the Eastern Defense Command.146
Air operations within the western zone were directed by the Fourth
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