[[image:Conscription map of the world.svg|thumb|300px|Map of the world of the army forms legend: No armed forces legend: No conscription legend: Plan to abolish conscription within 3 years legend: Conscription legend: No information]] An army (from Latin Armata "act of arming" via Old French armée), in the broadest sense, is the land-based armed forces of a nation. It may also include other branches of the military such as an air force. Within a national military force, the word Army may also mean a field army, which is an operational formation, usually made up of one or more corps.

In several countries the army is officially called the land army to differentiate it from an air force called the air army, notably France. In such countries, the word "army" on its own retains its connotation of a land force in common usage. The current largest army in the world by number of active troops is the People's Liberation Army of China with 2,250,000 active troops and 800,000 reserve personnel.

Field army

A field army is composed of a headquarters, army troops, a variable number of corps, and 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. Armies are controlled by a General or Lieutenant General. They also go to war.

Formations

Armies (as well as army groups and theaters) are large formations which vary significantly between armed forces in size, composition, and scope of responsibility.

In the Soviet Red Army and the Soviet Air Force, "Armies" were actually corps-sized formations, subordinate to an Army Group-sized "front" in wartime. In peacetime, a Soviet army was usually subordinate to a military district.

See also

• Military unit
• War
• Military history
• Paramilitary
• Militia
• Mercenary
• List of armies
• List of armies by country
• List of armies by number
• List of countries by size of armed forces
• List of countries by number of active troops
• List of countries by number of total troops