Armoured warfare in the context of "Leopard 2A6"

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.

According to the strategist William S. Lind, combined arms can be distinguished from the concept of "supporting arms" as follows:

The Battle of the Kerch Peninsula, which commenced with the Soviet Kerch-Feodosia Landing Operation (Russian: Керченско-Феодосийская десантная операция, romanized: Kerchensko-Feodosiyskaya desantnaya operatsiya) and ended with the German Operation Bustard Hunt (German: Unternehmen Trappenjagd), was a World War II battle between Erich von Manstein's German and Romanian 11th Army and the Soviet Crimean Front forces in the Kerch Peninsula, in the eastern part of the Crimean Peninsula. It began on 26 December 1941, with an amphibious landing operation by two Soviet armies intended to break the Siege of Sevastopol. Axis forces first contained the Soviet beachhead throughout the winter and interdicted its naval supply lines through aerial bombing. From January through April, the Crimean Front launched repeated offensives against the 11th Army, all of which failed with heavy losses. The Red Army lost 352,000 men in the attacks, while the Axis suffered 24,120 casualties. Superior German artillery firepower was largely responsible for the Soviet debacle.

On 8 May 1942, the Axis attacked in a major counteroffensive codenamed Trappenjagd which concluded by around 19 May 1942 with the defeat of the Soviet defending forces. Manstein used a large concentration of airpower, heavily armed infantry divisions, concentrated artillery bombardments and amphibious assaults to break through the Soviet front in its southern portion in 210 minutes, swing north with the 22nd Panzer Division to encircle the Soviet 51st Army on 10 May and annihilate it on 11 May. The remnants of the 44th and 47th armies were pursued to Kerch, where the last pockets of organized Soviet resistance were defeated by 19 May. The decisive element in the German victory was the campaign of airstrikes against the Crimean Front by Wolfram von Richthofen's 800 aircraft VIII. Fliegerkorps, which flew an average of 1,500 sorties per day in support of Trappenjagd and constantly attacked Soviet field positions, armored units, troop columns, medical evacuation ships, airfields, and supply lines. German bombers used up to 6,000 canisters of SD-2 anti-personnel cluster munitions to kill masses of fleeing Soviet infantrymen.

Combat arms (or fighting arms in non-American parlance) are troops within national armed forces who participate in direct tactical ground combat. In general, they are units that carry or employ weapons, such as infantry, cavalry, and artillery units. The use of multiple combat arms in mutually supporting ways is known as combined arms. In some armies, notably the British Army and Canadian Army, artillery and combat engineer units are categorized as combat support, while in others, such as the U.S. Army, they are considered part of the combat arms. Armored troops constitute a combat arm in name, although many have histories derived from cavalry units.

Artillery is included as a combat arm primarily based on the history of employing cannons in close combat, and later in the anti-tank role until the advent of anti-tank guided missiles. The inclusion of special forces in some armed forces as a separate combat arm is often doctrinal because the troops of special forces units are essentially specialized infantry, often with historical links to ordinary light infantry units.

Armour (Commonwealth English) or armor (American English; see spelling differences) is a covering used to protect an object, individual, or vehicle from physical injury or damage, especially direct contact weapons or projectiles during combat, or from a potentially dangerous environment or activity (e.g. cycling, construction sites, etc.). Personal armour is used to protect soldiers and war animals. Vehicle armour is used on warships, armoured fighting vehicles, and some combat aircraft, mostly ground attack aircraft.

A second use of the term armour describes armoured forces, armoured weapons, and their role in combat. After the development of armoured warfare, tanks and mechanised infantry and their combat formations came to be referred to collectively as "armour".

A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; their main armament is often mounted within a turret. They are a mainstay of modern 20th and 21st century ground forces and a key part of combined arms combat.

Modern tanks are versatile mobile land weapons platforms whose main armament is a large-calibre tank gun mounted in a rotating gun turret, supplemented by machine guns or other ranged weapons such as anti-tank guided missiles or rocket launchers. They have heavy vehicle armour which provides protection for the crew, the vehicle's munition storage, fuel tank and propulsion systems. The use of tracks rather than wheels provides improved operational mobility which allows the tank to overcome rugged terrain and adverse conditions such as mud and ice/snow better than wheeled vehicles, and thus be more flexibly positioned at advantageous locations on the battlefield. These features enable the tank to perform in a variety of intense combat situations, simultaneously both offensively (with direct fire from their powerful main gun) and defensively (as fire support and defilade for friendly troops due to the near invulnerability to common infantry small arms and good resistance against heavier weapons, although anti-tank weapons used in 2022, some of them man-portable, have demonstrated the ability to destroy older generations of tanks with single shots), all while maintaining the mobility needed to exploit changing tactical situations. Fully integrating tanks into modern military forces spawned a new era of combat called armoured warfare.

Blitzkrieg (Lightning/Flash Warfare) is a word used to describe a combined arms surprise attack, using a rapid, overwhelming force concentration that may consist of armored and motorized or mechanized infantry formations, together with artillery, air assault, and close air support. The intent is to break through an opponent's lines of defense, dislocate the defenders, confuse the enemy by making it difficult to respond to the continuously changing front, and defeat them in a decisive Vernichtungsschlacht: a battle of annihilation.

During the interwar period, aircraft and tank technologies matured and were combined with the systematic application of the traditional German tactic of Bewegungskrieg (maneuver warfare), involving the deep penetrations and the bypassing of enemy strong points to encircle and destroy opposing forces in a Kesselschlacht (cauldron battle/battle of encirclement). During the invasion of Poland, Western journalists adopted the term blitzkrieg to describe that form of armored warfare. The term had appeared in 1935, in the German military periodical Deutsche Wehr ("German Defence"), in connection to quick or lightning warfare.

Industrial warfare is a period in the history of warfare ranging roughly from the early 19th century and the start of the Industrial Revolution to the beginning of the Atomic Age, which saw the rise of nation-states, capable of creating and equipping large armies, navies, and air forces, through the process of industrialization.

The era featured mass-conscripted armies, rapid transportation (first on railroads, then by sea and air), telegraph and wireless communications, and the concept of total war. In terms of technology, this era saw the rise of rifled breech-loading infantry weapons capable of high rates of fire, high-velocity breech-loading artillery, chemical weapons, armoured warfare, metal warships, submarines, and aircraft.

Dragoons were originally a class of mounted infantry, who used horses for mobility, but dismounted to fight on foot. From the early 17th century onward, dragoons were increasingly also employed as conventional cavalry and trained for combat with swords and firearms from horseback. While their use goes back to the late 16th century, dragoon regiments were established in most European armies during the 17th and early 18th centuries; they provided greater mobility than regular infantry but were far less expensive than cavalry.

The name reputedly derives from a type of firearm, called a dragon, which was a handgun version of a blunderbuss, carried by dragoons of the French Army. The title has been retained in modern times by a number of armoured or ceremonial mounted regiments.