Mobile infantry is one of several military terms usually referring to infantry units equipped with vehicles. A military is an Organization authorized by its Nation to use force usually including use of Weapons in defending its Country (or by attacking The Infantry is the oldest and most numerous of the Combat Arms in the Armed forces, and consists Vehicles, derived from the Latin word vehiculum, are non-living Means of transport.

Before the development of railroads in the 19th century, infantry armies got to the battlefield by walking, or sometimes by ship. The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar A ship /ʃɪp/ is a large vessel that floats on water Ships are generally distinguished from Boats based on size In the late 19th century, some countries used horse-mounted and bicycle infantry, but the real revolution in mobility started in the 1920s with the use of motor vehicles, resulting in motorised infantry. The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar Mounted infantry were Soldiers who rode Horses instead of marching but actually fought on foot in the modern era with Muskets or Rifles but before Bicycle infantry are Infantry Soldiers who maneuver on the battlefield using Bicycles The term dates from the late 19th century when the " Safety The 1920s is sometimes referred to as the " Jazz Age " or the " Roaring Twenties " when speaking about the United States and Canada Motorised infantry is Infantry which is transported by Trucks or other motor vehicles Action in,Vietnam,North Korea, and Africa World War II demonstrated the importance of combined-arms tactics, with tanks and infantry advancing past the enemy's defences, while being supported by self-propelled artillery and ground-attack aircraft. World War II, or the Second World War, (often abbreviated WWII) was a global military conflict which involved a majority of the world's nations, including A tank is a tracked, Armoured fighting vehicle designed for Front-line combat which combines Operational mobility and tactical Artillery (from French artillerie) is a military Combat Arm which employs any apparātus machine That made necessary the protection of the infantry soldiers while they were advancing, requiring the development of mechanized infantry (also known in the US Army during WW2 as armored infantry) that could keep up with the tanks, and afford some protection to the infantrymen against shrapnel by using armoured vehicles for transport. Mechanized infantry (or "mech infantry" are Infantry equipped with Armored personnel carriers (APCs or Infantry fighting vehicles (IFVs As of the Algerian and Vietnam Wars, with the French and U. S. Army's experimentation with helicopters, infantry who are transported to combat via helicopter are part of airmobile infantry units (called 'Air Assault' in the United States Army). An Air Assault is a Tactical or Operational manoeuvre of an Infantry unit Airlifted by Helicopters usually to fulfil an Aerial Airmobile infantry are usually just called airborne infantry, though this ignores the distinction between paratroopers and airmobile infantry. Paratroopers are Soldiers trained in Parachuting and generally operate as part of an airborne force.

Some cavalry units, such as dragoons and American Mounted Rifles units, had doctrines which emphasised that horses were to be used only as means of transportation, and soldiers dismount for battle. The Cavalry (from French cavalerie) is the second oldest of the Combat Arms, and as Soldiers or Warriors who fought mounted on A dragoon is a soldier intended primarily to fight on foot but trained also in Horse riding and cavalry combat especially These can be considered more as mobile infantry then cavalry as well, although this distinction is rather blurred; most American Cavalry Units of the 1840-1920 period were actually such light dragoon or mounted infantry units rather than the true (and much heavier) cavalry of European and Latin American armies.

Modern-day infantry is supported by armoured fighting vehicles, artillery, and aircraft, but are still the only kind of military force that can take and hold ground, and thus remain essential to fighting wars. An armoured fighting vehicle ( AFV) is a military Vehicle, protected by armour and armed with Weapons Most AFVs are equipped for driving in rugged Artillery (from French artillerie) is a military Combat Arm which employs any apparātus machine In the early 21st Century, the idea of mobile infantry is often reserved for the various light infantry formations established by the United States, British, and other armies, intended to deploy and maneuver quickly without the large logistical tail of traditional mechanized units, whether they are deployed by air, water, or ground transport.

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