Combined arms
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.[1]
According to the strategist William S. Lind, combined arms can be distinguished from the concept of "supporting arms" as follows:
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 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.[3]
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 is sometimes pushed down below the level at which homogeneity ordinarily prevails, such as by temporarily attaching a tank company to an infantry battalion.
Middle Ages[edit]
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 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.[4]
The English victories of Crécy, Poitiers and Agincourt were examples of 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 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".[5] In the pursuit of a leader's goals and self-interest tactical and strategic thinking 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 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 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 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.
15th to 18th centuries[edit]
Generally the savanna cavalries of West Africa used a combined arms approach, seldom operating without supporting infantry.[7]
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 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 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 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 the Napoleonic Wars.
Napoleonic Wars[edit]
After 25 years of near continuous warfare, the armies that met at the Battle of Waterloo were organised 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 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 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.[8]
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 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.[9]