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IV Fighter Command
The IV Fighter Command is a disbanded United States Air Force unit. It was activated under Fourth Air Force at March Field, California in June 1941, when it replaced a provisional organization. It was responsible for training fighter units and for the air defense of the southern portion of the Pacific Coast. Following the attack on Pearl Harbor, the command's units were placed on alert. In 1942, its air defense responsibility was expanded to include the entire Pacific coast of the continental United States and the command moved its headquarters from southern California to Oakland Airport, California, which was more centrally located. As the threat to the Pacific decreased, it was disbanded on 31 March 1944. History Background GHQ Air Force (GHQ AF) had been established with two major combat functions, to maintain a striking force against long range targets, and the air defense of the United States. In the spring of 1941, the United States Department of War, War Department e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
P-39 Airacobra
The Bell P-39 Airacobra is a fighter produced by Bell Aircraft for the United States Army Air Forces during World War II. It was one of the principal American fighters in service when the United States entered combat. The P-39 was used by the Soviet Air Force, which used it to score the highest number of kills attributed to any US fighter type flown by any air force in any conflict. Other major users of the type included the Free French, the Royal Air Force, and the Italian Co-Belligerent Air Force.Gunston 1980, p. 22. The P-39 had an unusual layout, with the engine installed in the center fuselage, behind the pilot, and driving a tractor propeller in the nose with a long shaft. It was also the first fighter fitted with a tricycle undercarriage.Angelucci and Matricardi 1978, p. 25. Although its mid-engine placement was innovative, the P-39 design was handicapped by the absence of an efficient turbo-supercharger, preventing it from performing high-altitude work. For this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Theater Of Operations
Western Defense Command (WDC) was established on 17 March 1941 as the command formation of the United States Army responsible for coordinating the defense of the Pacific Coast region of the United States during World War II. A second major responsibility was the training of soldiers prior to their deployment overseas. The first Commanding General of WDC was Lieutenant General John L. DeWitt, who continued on in command of the Fourth U.S. Army. WDC headquarters were co-located at the existing Fourth Army headquarters at the Presidio of San Francisco. WDC's operational region covered the states of Washington, Oregon, California, Idaho, Montana, Nevada, Utah, and Arizona, and the Territory of Alaska. Until 11 December 1941, the command was little more than a planning agency. On that date the Army coast defense, antiaircraft, and fighter assets on the West Coast were placed under the command, which until 20 March 1942 was known as the Western Theater of Operations, then reverted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4th Bomber Command , or The Fourth of July
{{Disambiguation ...
Fourth or the fourth may refer to: * the ordinal form of the number 4 * ''Fourth'' (album), by Soft Machine, 1971 * Fourth (angle), an ancient astronomical subdivision * Fourth (music), a musical interval * ''The Fourth'', a 1972 Soviet drama See also * * * 1/4 (other) * 4 (other) * The fourth part of the world (other) * Forth (other) * Quarter (other) * Independence Day (United States) Independence Day, known colloquially as the Fourth of July, is a federal holiday in the United States which commemorates the ratification of the Declaration of Independence by the Second Continental Congress on July 4, 1776, establishing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2d Interceptor Command
D, or d, is the fourth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''dee'' (pronounced ), plural ''dees''. History The Semitic letter Dāleth may have developed from the logogram for a fish or a door. There are many different Egyptian hieroglyphs that might have inspired this. In Semitic, Ancient Greek and Latin, the letter represented ; in the Etruscan alphabet the letter was archaic but still retained. The equivalent Greek letter is delta, Δ. The minuscule (lower-case) form of 'd' consists of a lower-story left bowl and a stem ascender. It most likely developed by gradual variations on the majuscule (capital) form 'D', and is now composed as a stem with a full lobe to the right. In handwriting, it was common to start the arc to the left of the vertical stroke, resulting in a serif at the top of the arc. This serif was extended while the rest of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Observer Corps
The Ground Observer Corps (GOC), sometimes erroneously referred to as the Ground ''Observation'' Corps, was the name of two American civil defense organizations during the middle 20th century. World War II organization The first Ground Observer Corps was a World War II Civil Defense program of the United States Army Air Forces to protect United States territory against air attack. The 1.5 million civilian observers at 14,000 coastal observation posts performed naked eye and binocular searches to detect German or Japanese aircraft. Observations were telephoned to filter centers, which forwarded authenticated reports to the Aircraft Warning Service, which also received reports from Army radar stations. The program ended in 1944. A few Aircraft Warning Service Observation Towers survive as relics. Cold War organization The second Ground Observer Corps, with programmatic aims and methodologies similar to the first, was organized in early 1950, during the Cold War. Its creation wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain. The term ''RADAR'' was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term ''radar'' has since entered English and other languages as an anacronym, a common noun, losing all capitalization. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwave domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office Of Civilian Defense
Office of Civilian Defense was a United States federal emergency war agency set up May 20, 1941, by to co-ordinate state and federal measures for protection of civilians in case of war emergency. Its two branches supervised protective functions such as Blackout (wartime), blackouts and special fire protection and "war service" functions such as child care, health, housing, and transportation. It also created the Civil Air Patrol. The agency was terminated by Executive Order 9562 of June 4, 1945. The Office of Civil Defense with similar duties was established later. Fiorello La Guardia was the first head of the office, succeeded in 1942 by James M. Landis, followed in 1944 by General William N. Haskell. While the agency only had a paid staff of 75, it supervised and coordinated the efforts of civilian volunteers estimated to have topped 11 million. Volunteer tasks included firefighting and air-raid preparedness. Children, under adult supervision, could volunteer in the Junior C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackout (wartime)
A blackout during war, or in preparation for an expected war, is the practice of collectively minimizing outdoor light, including upwardly directed (or reflected) light. This was done in the 20th century to prevent crews of enemy aircraft from being able to identify their targets by sight, such as during the London Blitz of 1940. In coastal regions, a shoreside blackout of city lights also helped protect ships from being seen silhouetted against the artificial light by enemy submarines further out at sea. World War I United Kingdom Plans to black out British coastal towns in the event of war were drawn up in 1913 by Winston Churchill in his role as First Lord of the Admiralty; these plans were implemented on 12 August 1914, eight days after the United Kingdom had entered the war. On 1 October 1914, the Commissioner of the Metropolitan Police ordered that bright exterior lights were to be extinguished or dimmed in the London area and street lamps be partially painted out with b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barrage Balloons
A barrage balloon is a type of airborne barrage, a large uncrewed tethered balloon used to defend ground targets against aircraft attack, by raising aloft steel cables which pose a severe risk of collision with hostile aircraft, making the attacker's approach difficult and hazardous. Early barrage balloons were often spherical. The kite balloon, having a shape and cable bridling that stabilizes the balloon and reduces drag, could be operated at higher wind speeds than a spherical balloon. Some examples carried small explosive charges that would be pulled up against the aircraft to ensure its destruction. Barrage balloons are not practical at higher altitudes due in large part to the cable's weight. First World War France, Germany, Italy, and the United Kingdom used barrage balloons in the First World War. While the French and German forces developed kite balloons, early British barrage balloons were spherical. Sometimes, especially around London, several balloons were used to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antiaircraft Artillery
Anti-aircraft warfare (AAW) is the counter to aerial warfare and includes "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It encompasses surface-based, subsurface ( submarine-launched), and air-based weapon systems, in addition to associated sensor systems, command and control arrangements, and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location. However, for most countries, the main effort has tended to be homeland defense. Missile defense is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight. Most modern anti-aircraft (AA) weapons systems are optimized for short-, medium-, or long-range air defence, although some systems may incorporate multiple weapons (such as both autocannons and surface-to-air missiles). 'Layered air defence' usually refers to multiple 'tiers' of air defence systems which, when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interceptor Aircraft
An interceptor aircraft, or simply interceptor, is a type of fighter aircraft designed specifically for the defensive interception role against an attacking enemy aircraft, particularly bombers and reconnaissance aircraft. Aircraft that are capable of being or are employed as both "standard" air superiority fighters and as interceptors are sometimes known as fighter-interceptors. In the post-World War 2 jet age, there are two general classes of interceptor: light fighters, designed for high performance over short range; and heavy fighters, which are intended to operate over longer ranges, in contested airspace and adverse meteorological conditions. While the second type was exemplified historically by specialized night fighter and all-weather interceptor designs, the integration of mid-air refueling, satellite navigation, on-board radar, and beyond visual range (BVR) missile systems since the 1960s has allowed most frontline fighter designs to fill the roles once reserve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1st Marine Aircraft Wing
The 1st Marine Aircraft Wing is an aviation unit of the United States Marine Corps that serves as the Aviation Combat Element of the III Marine Expeditionary Force. The wing is headquartered at Camp Foster on the island of Okinawa Island, Okinawa, Japan. Activated in 1940, the wing has seen heavy combat operations during World War II, the Korean War, and the Vietnam War. Mission Conduct air operations in support of the Fleet Marine Forces to include offensive air support, antiair warfare, assault support, aerial reconnaissance including active and passive electronic countermeasures (ECM), and control of aircraft and missiles. As a collateral function, the Wing may participate as an integral component of Naval Aviation in the execution of such other Navy functions as the Fleet Commander may direct. Organization As of January 2025 the 1st Marine Aircraft Wing consists of four subordinate groups, a headquarters squadron and a liaison unit: * 1st Marine Aircraft Wing, at Cam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
