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44-652: The First Area Army ( 第1方面軍 , Dai-ichi hōmen gun ) was a field army of the Imperial Japanese Army during World War II , based in northern Manchukuo and active in combat against the Soviet Union in the closing stages of the war. The Japanese 1st Area Army was formed on July 4, 1942 under the control of the Kwantung Army as a military reserve and garrison force to maintain security and public order in northern Manchukuo as many veteran divisions of

88-500: A military to achieve mutually complementary effects—for example, using infantry and armour in an urban environment in which each supports the other. According to the strategist William S. Lind , combined arms can be distinguished from the concept of "supporting arms" as follows: Combined arms hits the enemy with two or more arms simultaneously in such a manner that the actions he must take to defend himself from one make him more vulnerable to another. In contrast, supporting arms

132-624: A battle would have lasted months with many hundreds of thousands of casualties. Co-ordination and planning were the key elements, and the use of combined arms tactics in the Hundred Days Offensive in 1918 allowed the Allied forces to exploit breakthroughs in the enemy trenches, forcing the surrender of the Central Powers . In World War II combined arms was a fundamental part of some operational doctrines like Heinz Guderian 's Blitzkrieg , or

176-566: A battlefield problem. For example, an armoured division , the modern paragon of combined arms doctrine, consists of a mixture of infantry, tank , artillery , reconnaissance , and helicopter units, all of which are co-ordinated and directed by a unified command structure . Also, most modern military units can, if the situation requires it, call on yet more branches of the military, such as infantry requesting bombing or shelling by military aircraft or naval forces to augment their ground offensive or protect their land forces. The mixing of arms

220-488: A combination of these skilled and unskilled forces to win battles. An army that has multiple skills available can engage a larger force that incorporates mainly one or two types of troops. Each type of military formation – infantry, archers, cavalry, or peasants – has certain advantages that the other does not have. Infantry allows a force to hold ground and in the event of overwhelming enemy forces withdraw into terrain that mounted troops cannot maneuver as easily, thus negating

264-573: A combined arms approach, seldom operating without supporting infantry. The French army of the Valois kings, composed of heavily armoured gendarmes (professional versions of the medieval knight ), Swiss and Landsknecht mercenary pikemen , and heavy cannons took form during the transition from the medieval way of war to the early modern period . The late 15th century saw the development of combined pike and shot formations in Europe, starting with

308-474: A headquarters, and usually controls at least two corps, beneath which are a variable number of divisions . A battle is influenced at the field army level by transferring divisions and reinforcements from one corps to another to increase the pressure on the enemy at a critical point. NATO armies are commanded by a general or lieutenant general . Combined arms Combined arms is an approach to warfare that seeks to integrate different combat arms of

352-767: A numerical name, such as the British Army of the Rhine , Army of the Potomac , Army of the Niemen or Aegean Army (also known as the Fourth Army). The Roman army was among the first to feature a formal field army, in the sense of a very large, combined arms formation, namely the sacer comitatus , which may be translated literally as "sacred escort". The term is derived from their being commanded by Roman emperors (who were regarded as sacred), when they acted as field commanders . While

396-516: A simple form of combined arms, with a combination of dismounted knights forming a foundation for formations of English longbowmen . The lightly protected longbowmen could down their French opponents at a distance, whilst the armoured men-at-arms could deal with any Frenchmen who made it to the English lines. This is the crux of combined arms: to allow a combination of forces to achieve what would be impossible for its constituent elements to do alone. During

440-459: A unit of heavy infantrymen armed with just sword and pilum, and fielded with a small attached auxiliary skirmishers and missile troops, and incorporated a small cavalry unit. The legion was sometimes also incorporated into a higher-echelon combined arms unit – e.g., in one period it was customary for a general to command two legions plus two similarly sized units of auxiliaries, lighter units useful as screens or for combat in rough terrain. Later during

484-460: Is hitting the enemy with two or more arms in sequence, or if simultaneously, then in such combination that the actions the enemy must take to defend himself from one also defends himself from the other(s). Though the lower- echelon units of a combined arms team may be of similar types, a balanced mixture of such units are combined into an effective higher-echelon unit, whether formally in a table of organization or informally in an ad hoc solution to

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528-486: Is sometimes pushed down below the level at which homogeneity ordinarily prevails, such as by temporarily attaching a tank company to an infantry battalion. Combined arms operations date back to antiquity, where armies would usually field a screen of skirmishers to protect their spearmen during the approach to contact. Especially in the case of the Greek hoplites , however, the focus of military thinking lay almost exclusively on

572-469: Is supplemented by satellite photos and passive reception of enemy radio emissions, forward observers with digital target designation, specialized scouting aircraft, anti-artillery radars and gun-laying software for artillery. Based on this doctrine, many US ground vehicles moved across the landscape alone. If they encountered an enemy troop or vehicle concentration, they would assume a defensive posture, lay down as much covering fire as they could, designate

616-418: Is usually given as a major contributing factor in the failure. It is an example of why generals needed to use combined arms to overcome the tactics used by enemy officers to frustrate an attack by a single arm of an army. In contrast the 27th (Inniskilling) suffered 478 casualties from an initial strength of 750 because of their exposure to attack by French combined arms. They were located near

660-643: The Napoleonic Wars . After 25 years of near continuous warfare, the armies that met at the Battle of Waterloo in 1815 were organized in a similar manner – into corps which contained infantry, cavalry and artillery (see Order of battle of the Waterloo Campaign ), and used similar combined arms tactics. Within each corps were divisions of infantry or cavalry made up of brigades and an artillery unit. An army would usually also have reserves of all three arms under

704-674: The Red Army when the Soviet Union invaded Manchukuo at the end of World War II . Without adequate armor, ammunition or leadership, many units broke and fled, or surrendered en masse. Many surviving soldiers of the 1st Area Army, including its commanding officer General Seiichi Kita, became prisoners in Siberia and other parts of the Soviet Union after the surrender of Japan on August 15, 1945. Field army Specific field armies are usually named or numbered to distinguish them from "army" in

748-722: The colunelas of the Spanish general Gonzalo Fernández de Córdoba , evolving into the tercios of Hapsburg Spain and the Imperial Army of the Holy Roman Empire during the 16th century . In Japan, at the battle of Nagashino (長篠の戦い) in 1575, forces of the Oda clan successfully employed combined arms against the Takeda clan , which heavily relied on cavalry. The Oda army erected palisades to protect their ashigaru musketeers that shot down

792-711: The Kwantung Army were transferred to the various southern fronts in the Pacific War . It consisted mostly of minimally-trained reservists , conscripted students and home guard militia , without adequate weapons or supplies. The 1st Area Army was headquartered in Dunhua , in what is now the Yanbian Korean Autonomous Prefecture of Jilin Province , China . The units of the 1st Area Army proved to be no match for

836-540: The Middle Ages military forces used combined arms as a method of winning battles and furthering a war leader or king's long-term goals. Some historians claim that during the Middle Ages there was no strategic or tactical art to military combat. Kelly DeVries uses the Merriam-Webster definition of combat "as a general military engagement". In the pursuit of a leader's goals and self-interest tactical and strategic thinking

880-472: The Roman comitatensis (plural: comitatenses ) is sometimes translated as "field army", it may also be translated as the more generic "field force" or "mobile force" (as opposed to limitanei or garrison units). In some armed forces, an "army" is or has been equivalent to a corps-level unit . Prior to 1945, this was the case with a gun ( 軍 ; 'army') within the Imperial Japanese Army , for which

924-637: The Roman Empire, auxiliary soldiers outnumbered the core legionary troops. The army of the Han dynasty is also an example, fielding mêlée infantry (equipped with a variety of different weapons ranging from swords to pikes to halberd-like weapons), archers, crossbowmen, and cavalry (ranging from horse archers to heavy lancers). One recorded tactical formation during the Han dynasty included three ranks of halberds, swordsmen, and spearmen, supported by crossbows, and with cavalry on

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968-604: The Soviet deep battle doctrine, which was based on combining tanks, mobile units (mechanised infantry or cavalry) and infantry, while supported by artillery. In 1963 the United States Marine Corps formalized the concept of the Marine Air-Ground Task Force , which combined Marine aviation and Marine ground units for expeditionary missions. The Vietnam War had a profound influence on the development of

1012-463: The Takeda cavalry while their samurai cut down any enemies who managed to approach melee range. The 17th century saw increasing use of combined arms at lower (regimental) level. King Gustavus Adolphus of Sweden was the proponent of the idea. For fire support he attached teams of "commanded musketeers" to cavalry units and fielded light 3-pounder guns to provide infantry units with organic artillery. In

1056-544: The US Army in Vietnam also learned to combine helicopter operations and airmobile infantry with the armoured and artillery units operating from fire support bases as well as the US brown-water navy and USAF close air support units supporting them. AirLand Battle was the overall conceptual framework that formed the basis of the US Army's European warfighting doctrine from 1982 into

1100-476: The US Army's combined arms doctrine. Due to the very difficult terrain that prevented access to the enemy-held areas of operation , troops were often deployed by air assault . For this reason, US troops in Vietnam saw six times more combat than in preceding wars, due to less time spent on logistic delays. The result: an infantry unit increased in effectiveness by a factor of four for its size, when supported with helicopter-delivered ammunition, food and fuel. In time

1144-467: The Western Front, fighting descended into stagnant trench warfare . Generals on both sides applied conventional military thinking to the new weapons and situations that they faced. In these early stages, tactics typically consisted of heavy artillery barrages followed by massed frontal assaults against well entrenched enemies. These tactics were largely unsuccessful and resulted in large loss of life. As

1188-429: The advantage of the horse. Archers provide standoff with their bows or crossbows. Cavalry can maneuver faster and provide fast attack before the enemy has had time to prepare defenses. Peasants are more numerous and cheaper on the royal coffers. Over the long term the army can cross-train and learn the skills of the specialties to increase combat effectiveness . This is known as a combat multiplier today. The combination of

1232-541: The centre of Wellington's line, but unlike most of the rest of Wellington's infantry were in a declivity on the exposed side of the Mont-Saint-Jean escarpment . Exposed as they were, they were forced to stand in square for most of the day for fear of cavalry attack and so made an easy dense target for Napoleon's massed artillery. The development of modern combined arms tactics began in the First World War . Early in

1276-403: The different skills help provide a commander the flexibility to minimize risk when it comes to engagements. The overall objective of any military force is to fight and win, while also preserving the largest number of combatants to carry on the larger strategic aims of the king. This can be seen in some of the engagements during the Middle Ages. Generally the savanna cavalries of West Africa used

1320-402: The direct command of the army commander which could be sent in support of any corps or division of a corps to increase any arm which the army general considered necessary. The great French cavalry charge commanded by Marshal Ney during the battle failed to break Wellington's squares of infantry and Ney's failure to supplement his cavalry with sufficient horse artillery to break the squares open

1364-418: The eighteenth century, the concept of the legion was revived. Legions now consisted of musketeers , light infantry , dragoons and artillery in a brigade sized force. These legions often combined professional military personnel with militia . Perhaps the most notable example is the use of light cavalry , light infantry and light horse artillery in advance detachments by France's La Grande Armée during

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1408-562: The enemy. Philip II of Macedon greatly improved upon the limited combined arms tactics of the Greek city-states and combined the newly created Macedonian phalanx with heavy cavalry and other forces. The phalanx would hold the opposing line in place, until the heavy cavalry could smash and break the enemy line by achieving local superiority. The early Republic Roman Legion was a combined arms force and consisted of five classes of troops. Lightly equipped velites acted as skirmishers armed with light javelins. The hastati and principes formed

1452-504: The flanks. Civilizations such as the Carthaginians and Sassanids also were known to have fielded a combination of infantry supported by powerful cavalry. At the Battle of Hastings (1066) English infantry fighting from behind a shield wall were defeated by a Norman army consisting of archers, foot soldiers (infantry), and mounted knights (cavalry). One of the tactics used by the Normans

1496-597: The formation equivalent in size to a field army was a hōmen-gun ( 方面軍 ; 'area army'). In the Soviet Red Army and the Soviet Air Forces , an army was subordinate in wartime to a front (an equivalent of army group ). It contained at least three to five divisions along with artillery, air defense, reconnaissance and other supporting units. It could be classified as either a combined arms army (CAA) or tank army (TA); and while both were combined arms formations,

1540-454: The former contained a larger number of motorized rifle divisions while the latter contained a larger number of tank divisions . In peacetime, a Soviet army was usually subordinate to a military district . Modern field armies are large formations which vary significantly between armed forces in size, composition, and scope of responsibility. For instance, within NATO a field army is composed of

1584-655: The ground assault phase, tanks and other armoured fighting vehicles supported by attack aircraft swept over remaining forces. The front line moved forward at upwards of 40–50 km/h at the upper limit of the Army's tracked vehicles. In 2000, the US Army began developing a new set of doctrines intended to use information superiority to wage warfare. Six pieces of equipment were crucial for this: AWACS (for Airborne early warning and control ), JSTARS (for Airborne ground surveillance ), GPS , VHF SINCGARS (for ground and airborne communications), and ruggedized computers . The mix

1628-418: The heavy infantry. In more elaborate situations armies of various nationalities fielded different combinations of light, medium, or heavy infantry, cavalry, chariotry, camelry, elephantry, and artillery (mechanical weapons). Combined arms in this context was how to best use the cooperating units, variously armed with side-arms, spears, or missile weapons in order to coordinate an attack to disrupt and then destroy

1672-431: The late 1990s. AirLand Battle emphasized close coordination between land forces acting as an aggressively maneuvering defense, and air forces attacking rear-echelon forces feeding those front line enemy forces. In the 1991 Gulf War , General Schwarzkopf used a mix of strikes by fixed-wing aircraft including carpet bombing and precision bombing in combination with large numbers of strikes by attack helicopters . During

1716-431: The main attacking strength of the legion with swords and pila , whilst the triarii formed the defensive backbone of the legion fighting as spearmen (initially as a denser Greek phalanx and later as a looser spear wall formation) with long spears and large shields. The fifth class of troops were the equites (the cavalry), which were used for scouting, pursuit and to guard the flanks. The Legion then became notionally

1760-418: The sense of an entire national defence force or land force. In English , the typical orthographic style for writing out the names field armies is word numbers , such as "First Army"; whereas corps are usually distinguished by Roman numerals (e.g. I Corps) and subordinate formations with ordinal numbers (e.g. 1st Division). A field army may be given a geographical name in addition to or as an alternative to

1804-465: The targets for requested air and artillery assets. Within a few minutes, on station aircraft would direct their missions to cover the ground vehicle. Within a half-hour heavy attack forces would concentrate to relieve the isolated vehicle. In an hour and a half the relieved vehicle would be resupplied. In 2020, the Israel Defense Forces established a dedicated combined arms battalion to test

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1848-518: The war progressed new combined arms tactics were developed, often described then as the "all arms battle". These included direct close artillery fire support for attacking soldiers (the creeping barrage ), air support and mutual support of tanks and infantry. One of the first instances of combined arms was the Battle of Cambrai , in which the British used tanks, artillery, infantry, small arms and air power to break through enemy lines. Previously such

1892-635: Was to tempt the English to leave the shield wall to attack retreating Norman infantry only to destroy them in the open with cavalry. Likewise Scottish sheltrons – which had been developed to counter the charges by English heavy cavalry, and had been used successfully against English cavalry at the Battle of Stirling Bridge (1297) – were destroyed at the Battle of Falkirk (1298) by English archers acting in concert with mounted knights. Both Hastings and Falkirk showed how combined arms could be used to defeat enemies relying on only one arm. The English victories of Crécy , Poitiers and Agincourt were examples of

1936-409: Was used along with taking advantage of the terrain and weather in choosing when and where to give battle. The simplest example is the combination of different specialties such as archers, infantry, cavalry (knights or shock mounted troops), and even peasant militia. At times, each force fought on its own and won or lost depending on the opposing military competence. During the Middle Ages leaders utilized

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