Theatre History of Operations Reports

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Theatre History of Operations Reports or THOR is a United States Air Force historical ordnance database endeavoring to catalog every bomb dropped by the United States Armed Forces since World War I.

The officer overall responsible for the project is Lieutenant Colonel Jenns Robertson. [1]

Apart from the project's historical value, the database is being used by the U.S. and other countries for practical purposes such as helping to locate possible unexploded ordnance in places like Germany, Vietnam and Iraq although data dating from 1991 onward is still classified for security purposes. [2]

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<span class="mw-page-title-main">Bomber</span> Heavy ground attack aircraft

A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry, launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an aircraft occurred in the Italo-Turkish War, with the first major deployments coming in the First World War and Second World War by all major airforces causing devastating damage to cities, towns, and rural areas. The first purpose built bombers were the Italian Caproni Ca 30 and British Bristol T.B.8, both of 1913. Some bombers were decorated with nose art or victory markings.

<span class="mw-page-title-main">Little Boy</span> Atomic bomb dropped on Hiroshima

Little Boy was the type of atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II, making it the first nuclear weapon used in warfare. The bomb was dropped by the Boeing B-29 Superfortress Enola Gay piloted by Colonel Paul W. Tibbets Jr., commander of the 509th Composite Group, and Captain Robert A. Lewis. It exploded with an energy of approximately 15 kilotons of TNT (63 TJ) and caused widespread death and destruction throughout the city. The Hiroshima bombing was the second man-made nuclear explosion in history, after the Trinity nuclear test.

<span class="mw-page-title-main">Manhattan Project</span> Project that produced the first atomic bombs

The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. The nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the bombs. The Army component was designated the Manhattan District, as its first headquarters were in Manhattan; the name gradually superseded the official codename, Development of Substitute Materials, for the entire project. The project absorbed its earlier British counterpart, Tube Alloys. The Manhattan Project began modestly in 1939, but employed nearly 130,000 people at its peak and cost nearly US$2 billion. Over 90 percent of the cost was for building factories and to produce fissile material, with less than 10 percent for development and production of the weapons. Research and production took place at more than 30 sites across the United States, the United Kingdom, and Canada.

<span class="mw-page-title-main">Boeing B-29 Superfortress</span> US heavy bomber aircraft with 4 piston engines, 1942

The Boeing B-29 Superfortress is an American four-engined propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to its predecessor, the B-17 Flying Fortress, the Superfortress was designed for high-altitude strategic bombing, but also excelled in low-altitude night incendiary bombing, and in dropping naval mines to blockade Japan. B-29s dropped the atomic bombs on Hiroshima and Nagasaki, the only aircraft ever to drop nuclear weapons in combat.

<span class="mw-page-title-main">Cluster munition</span> Explosive weapon with small submunitions

A cluster munition is a form of air-dropped or ground-launched explosive weapon that releases or ejects smaller submunitions. Commonly, this is a cluster bomb that ejects explosive bomblets that are designed to kill personnel and destroy vehicles. Other cluster munitions are designed to destroy runways or electric power transmission lines.

<span class="mw-page-title-main">Bomb disposal</span> Activity to dispose of and render safe explosive munitions and other materials

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<span class="mw-page-title-main">GBU-43/B MOAB</span> American large-yield bomb

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Incendiary weapons, incendiary devices, incendiary munitions, or incendiary bombs are weapons designed to start fires or destroy sensitive equipment using fire, using materials such as napalm, thermite, magnesium powder, chlorine trifluoride, or white phosphorus. Though colloquially often known as bombs, they are not explosives but in fact are designed to slow the process of chemical reactions and use ignition rather than detonation to start or maintain the reaction. Napalm, for example, is petroleum especially thickened with certain chemicals into a 'gel' to slow, but not stop, combustion, releasing energy over a longer time than an explosive device. In the case of napalm, the gel adheres to surfaces and resists suppression.

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A blockbuster bomb or cookie was one of several of the largest conventional bombs used in World War II by the Royal Air Force (RAF). The term blockbuster was originally a name coined by the press and referred to a bomb which had enough explosive power to destroy an entire street or large building through the effects of blast in conjunction with incendiary bombs.

<span class="mw-page-title-main">Smyth Report</span> First official account of the Manhattan Project

The Smyth Report is the common name of an administrative history written by American physicist Henry DeWolf Smyth about the Manhattan Project, the Allied effort to develop atomic bombs during World War II. The subtitle of the report is A General Account of the Development of Methods of Using Atomic Energy for Military Purposes. It was released to the public on August 12, 1945, just days after the atomic bombings of Hiroshima and Nagasaki on August 6 and 9.

<span class="mw-page-title-main">Azon</span> American guided bomb

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<span class="mw-page-title-main">ASM-N-2 Bat</span> U.S. World War II glide bomb

The ASM-N-2 Bat was a United States Navy World War II radar-guided glide bomb which was used in combat beginning in April 1944. It was developed and overseen by a unit within the National Bureau of Standards with assistance from the Navy's Bureau of Ordnance, the Massachusetts Institute of Technology, and Bell Telephone Laboratories. It is considered to be the first fully automated guided missile used in combat.

<span class="mw-page-title-main">United States Army Ordnance Corps</span> Military unit of the United States Army responsible for supply of weapons and ammunition

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<span class="mw-page-title-main">Project Alberta</span> Section of the Manhattan Project, active 1945

Project Alberta, also known as Project A, was a section of the Manhattan Project which assisted in delivering the first nuclear weapons in the atomic bombing of Hiroshima and Nagasaki during World War II.

<span class="mw-page-title-main">509th Composite Group</span> US Air Force unit tasked with the atomic bombing of Hiroshima and Nagasaki

The 509th Composite Group was a unit of the United States Army Air Forces created during World War II and tasked with the operational deployment of nuclear weapons. It conducted the atomic bombings of Hiroshima and Nagasaki, Japan, in August 1945.

<span class="mw-page-title-main">Pumpkin bomb</span> Conventional high-explosive bomb

Pumpkin bombs were conventional aerial bombs developed by the Manhattan Project and used by the United States Army Air Forces against Japan during World War II. It was a close replication of the Fat Man plutonium bomb with the same ballistic and handling characteristics, but it used non-nuclear conventional high explosives. It was mainly used for testing and training purposes, which included combat missions flown with pumpkin bombs by the 509th Composite Group. The name "pumpkin bomb" was the term used in official documents from the large, fat ellipsoidal shape of the munition casing instead of the more usual cylindrical shape of other bombs, intended to enclose the Fat Man's spherical "physics package".

<span class="mw-page-title-main">Atomic bombings of Hiroshima and Nagasaki</span> August 1945 attack in Japan during WWII

On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki, respectively. The aerial bombings together killed between 129,000 and 226,000 people, most of whom were civilians, and remain the only use of nuclear weapons in an armed conflict. Japan surrendered to the Allies on 15 August, six days after the bombing of Nagasaki and the Soviet Union's declaration of war against Japan and invasion of Japanese-occupied Manchuria. The Japanese government signed the instrument of surrender on 2 September, effectively ending the war.

<span class="mw-page-title-main">Project Camel</span> Caltech work supporting the WW II Manhattan Project

Project Camel encompassed the work performed by the California Institute of Technology (Caltech) in support of the Manhattan Project during World War II. These activities included the development of detonators and other equipment, testing of bomb shapes dropped from Boeing B-29 Superfortress bombers, and the Salt Wells Pilot Plant, where explosive components of nuclear weapons were manufactured.

<span class="mw-page-title-main">AB 500-3A</span> Cluster bomb

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References

  1. Bender, Bryan (July 30, 2012). "Bomb database useful for past, present wars". The Boston Globe. Retrieved 7 August 2012.
  2. Dvorsky, George (August 2012). "The Pentagon has created a database of every bomb they've dropped since the First World War". io9 . Retrieved 7 August 2012.