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In modern use, the order of battle of an armed force participating in a military operation or campaign shows the hierarchical organization, command structure, strength, disposition of personnel, and equipment of units and formations of the armed force. Various abbreviations are in use, including OOB, O/B, or OB, while ORBAT remains the most common in the United Kingdom. An order of battle is distinct from a table of organisation, which is the intended composition of a given unit or formation according to the military doctrine of its armed force. Historically, an order of battle was the order in which troops were positioned relative to the position of the army commander or the chronological order in which ships were deployed in naval situations.
As combat operations develop during a campaign, orders of battle may be revised and altered in response to the military needs and challenges. Also the known details of an order of battle may change during the course of executing the commanders' after action reports and/or other accounting methods (e.g. despatches) as combat assessment is conducted.
In its original form during the Medieval period of European warfare, an order of battle was the order in which troops were positioned relative to the position of the army commander. The term was also applied to the disposition of ships in the line of battle during the age of sail. In the later transformation of its meaning during the European period of Early Modern warfare the order of battle came to mean the order in which the units manoeuvered or deployed onto the battlefield to form battle-lines, with the positioning on the right considered the place of greatest honour. This need to reflect the unit seniority led to the keeping of military staff records, in tabular form reflecting the compilation of units an army, their commanders, equipment, and locations on the battlefield.
During the Napoleonic wars the meaning of the order of battle changed yet again to reflect the changes in the composition of opposing forces during the battle owing to use of larger formations than in the previous century. Napoleon also instituted the staff procedure of maintaining accurate information about the composition of the enemy order of battle, and tables of organisation, and this later evolved into an important function and an organisational tool used by military intelligence to analyse enemy capability for combat.
British military history is the source of some of the earliest orders of battle in the English language, and due to the British Empire's involvement in global conflicts over several centuries the records of historical orders of battle provide a valuable source of study for understanding not only of the composition, but also of tactics and doctrines of the forces through their depiction in the orders of battle. The British Army and UK forces use the acronym ORBAT to describe the structure of both friendly and enemy forces.
Operation Quicksilver, part of the British deception plan for the Invasion of Normandy in World War II, fed German intelligence a combination of true and false information about troop deployments in Britain, causing the Germans to deduce an order of battle which suggested an invasion at the Pas-de-Calais instead of Normandy.
Clausewitz defined the 'order of battle' as "that division and formation of the different arms into separate parts, or sections, of the whole Army, and that form of general position or disposition of those parts which is to be the norm throughout the whole campaign or war."
Normally these tactics are exercised in peace and cannot be essentially modified when war breaks out. Order of battle belongs more to tactics than strategy. Clausewitz also noted that the order of battle depends on the effective span of control by a commander. Too few subunits makes an army unwieldy; too many subunits makes the 'power of the superior will' weak; and in addition every step by which an order has to pass weakens its effect by loss of force and longer time of transmission. Clausewitz recommended that armies have no more than eight to ten subunits and subordinate corps four to six subunits. [1]
In United States Army standing operating procedures, an order of battle to be used for operations planning should relate what an Army unit might be expected to encounter while deployed in the field. The templating of the OoB during maneuvers is typically the responsibility of a battalion or brigade commander, conducted through their Headquarters S-2 (intelligence) sections. Observations about enemy troop movements may be gathered by various military intelligence resources from all echelons, including the employment of any attached special forces units (such as Rangers or LRS teams) as well as Cavalry RSTA squadrons.
From such intelligence data, the OOB section staff compiles a likely order of battle for a planning document or operations order by assessing the following factors:
Enemy's Composition, Disposition, Strength (often mnemonicized with SALUTE: Size, Activity, Location, Unit, Time, Equipment):
Enemy capabilities and limitations (often mnemonicized with DRAWD: Defend, Reinforce, Attack, Withdraw, Delay):
Enemy's Most Likely Course of Action (EMLCOA):
A general rule in American military doctrine is that each unit should keep track of enemy subunits two echelons below its own: that is, a division should monitor enemy units confronting it down to the battalion, a brigade should monitor enemy units down to companies, and a battalion should monitor enemy forces down to platoons.
The United States military's intelligence capabilities in the 21st century have allowed for monitoring even further than two echelons down the chain of command. This situational awareness provides a more complete picture of the battlespace for both combatant commanders and tactical commanders.
Up until the end of the Cold War, determining realistic orders of battle was generally an orderly but extremely frustrating process for NATO. The intelligence situation for Western militaries has since been exacerbated as they continue to become engaged in operations against non-traditional enemies (insurgents, guerrillas, etc.) and compiling orders of battle for irregular forces becomes very difficult; the equivalent military intelligence output requiring an increase in acquired data and analysis effort to provide an accurate and timely picture to the commander.
An example of ORBATs in modern warfare can be found for German forces and Allied forces during the Normandy landings. Other examples include the Battle of Bình Giã during the Vietnam War and the Battle of Al Faw during the Iraq War.
The Armed Forces of the Republic of Croatia are the military forces organized for the defense of the Republic of Croatia and its allies by military means and for other forms of use and use in accordance with the domestic and international law. The Croatian Armed Forces protect the sovereignty and independence of the Republic of Croatia and defend its territorial integrity.
Combined arms is an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects—for example, using infantry and armour in an urban environment in which each supports the other.
Military science is the study of military processes, institutions, and behavior, along with the study of warfare, and the theory and application of organized coercive force. It is mainly focused on theory, method, and practice of producing military capability in a manner consistent with national defense policy. Military science serves to identify the strategic, political, economic, psychological, social, operational, technological, and tactical elements necessary to sustain relative advantage of military force; and to increase the likelihood and favorable outcomes of victory in peace or during a war. Military scientists include theorists, researchers, experimental scientists, applied scientists, designers, engineers, test technicians, and other military personnel.
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An Operation Order, often abbreviated to OPORD, is a plan format meant to assist subordinate units with the conduct of military operations. An OPORD describes the situation the unit faces, the mission of the unit, and what supporting activities the unit will conduct in order to achieve their commander's desired end state. Normally an OPORD is generated at the battalion, regimental, brigade, divisional, or corps headquarters and disseminated to its assigned or attached elements. The issuance of an OPORD triggers subordinate unit leadership to develop orders specific to the role or roles that the unit will assume within the operation. This more narrowly focused order borrows information from the original, or base, order and adds additional details that pertain more to the minutiae of the actions a unit is tasked to conduct in support of the overarching operation.
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The 108th Nevelskaya Motor Rifle Division, abbreviated as the "108th MRD," was a unit of the Soviet Ground Forces and the Armed Forces of Uzbekistan. It was the successor to the 360th Rifle Division. The division was created in August 1941 by the State Defense Committee and the Volga Military District Commander, Vasily Gerasimenko, in the Volga Military District. The 360th compiled a distinguished record of service during the Great Patriotic War on the northern sector of the Soviet-German front, including the award of a battle honor and the Order of the Red Banner.
The 140th Rifle Division was a Red Army rifle division that saw service during the Great Patriotic War. Originally formed during the prewar buildup of the Red Army, the 140th might be regarded as the unluckiest division in the Army, as it, uniquely, had to be completely, or almost completely, re-formed three times between 1941 and 1943, being destroyed in the Uman pocket during Operation Barbarossa, the Vyasma pocket during Operation Typhoon, and on the Caucasian steppes in the face of the German summer offensive of 1942. In spite of this, the fourth formation of the 140th went on to have a very distinguished record in combat, a testament to the resiliency of the Red Army in World War II.
The 307th Rifle Division was raised in 1941 as a standard Red Army rifle division, and served for the duration of the Great Patriotic War in that role. The division distinguished itself in the intense defensive fighting around the village of Ponyri during the Battle of Kursk. It was credited with the liberation of the town of Novozybkov on September 25, 1943. After battling its way through eastern Belarus during the autumn and winter of 1943–44, and then helping complete its liberation during Operation Bagration, it was moved to East Prussia, where it took part in the Battle of Königsberg in the spring of 1945, ending the war on the Baltic coast near the Zemland Peninsula. In the course of these campaigns the 307th compiled a battle record to rival a Guards unit but was nevertheless disbanded on the second-last day of 1945.
The 221st Rifle Division was formed as an infantry division of the Red Army after a motorized division of that same number was redesignated about four weeks after the start of the German invasion of the Soviet Union. After several further redesignations the division, which had always been a rifle division for all intents and purposes, was destroyed during Operation Typhoon in October 1941.