The armed forces are the backbone of defending the security of their countries on land, sea, and air.^[1][2][3] They are organised, armed, and trained to achieve the goals set by the state that they fight for.

Many countries in the present day separate their armed forces that fight on land, at sea, in the air, and policing the border. These groups are usually called:

• Army
• Navy
• Air force
• Air defense
• Border guards

• Military

v t e Military and war
Concepts	Military Service History Technology Occupational roles Recruitment Roles: Soldier Sailor Airman Enlisted rank Officer Commanding officer Executive officer Protocols and structure: Ranks List Uniforms Awards and decorations By country Highest Categories: Ranks
Forces	Command and control Defense ministry Military / Armed Forces: Army Navy Air force Marines Space force Special forces Airborne forces Commando Frogman Militia Reserves Functional specialties: Communications Engineers Intelligence Reconnaissance List Medical Military police Gendarmerie Security forces Border guard Coast guard Logistics By country Categories: Combat occupations Development: Basic training Military maneuvers Combat training
Branches	Land units: Combat arms Infantry Armor Cavalry Artillery Special reconnaissance Signal corps Naval units: Warships Surface Littoral Patrol Submarines Aircraft carriers Landing craft Auxiliary ship Air units: Fighters Bombers Command Close air support Electronic-warfare Reconnaissance
Structure	Organization By country Armies by country Chain of command Unified combatant command General staff Land: Army group Field army Corps List Division List Brigade By type Regiment By country By type Battalion By country By type Platoon Squad Naval: Naval fleet Task force Carrier strike group Division Flotilla Squadron Air: Combat box Special units by nation: Battle Fleet; U.S. Navy Front; Russian land forces
Vehicles	Ground: Ground List Combat Tracked vehicles Wheeled vehicles Armor Tank Infantry fighting vehicle Lists By country Armored car Scout car Truck List Gun truck Self-propelled artillery List Anti-aircraft Rail
Weapons	Land Weapons List Artillery: Artillery List By country Battery Field gun List Howitzer List Rocket List Infantry guns: Pistols Machine guns List Service rifles: Battle rifles List Assault rifle List Sniper rifle Other infantry weapons: Bazooka Anti-tank gun List Grenade List Flamethrower Bayonet Combat knife List Missiles: Shoulder-fired Anti-tank List By country Mortar Lists: Infantry Heavy Other: Land mine Shells Sea/Air: Guided missiles List Naval: Naval artillery List Anti-ship missiles Torpedoes Depth charges Close-in weapons Aerial: Guns Missiles Bombs
Equipment	Military equipment Lists By country Helmet List Camouflage List Body armor Facilities: Military base Lists Field hospital
Combat systems	Fire-control system Fire-control radar Director (military) Combat information center Sonar Radar Historical: Ship gun fire-control Gun data computer Torpedo Data Computer
Warfare	War Battle Strategy Tactics Combat Military science Diplomacy International law By era: Prehistoric Ancient Post-classical Early modern Late modern industrial fourth-gen By type: Armoured warfare Artillery Barrage Biological Camouflage Cavalry Chemical Class Combined arms Conventional Cyber Denial Disinformation Drone Electronic Infantry Lawfare Loitering Music Nuclear Psychological Radiological Unconventional
Battlespace	Aerospace Air Airborne Space Land Cold-region Desert Jungle Mountain Urban Sea Amphibious Blue Brown Green Surface Underwater Subterranean Tunnel Cyber Information
Tactics	List of military tactics Aerial Airlift Airbridge Airdrop Battle Cavalry Charge Counterattack Counterinsurgency Defeat in detail Foxhole Envelopment Guerrilla Morale Rapid dominance Siege Swarming Tactical objective Target saturation Trench Withdrawal
Operational	Military operation Operations research Blitzkrieg Expeditionary Deep operation Maneuver Operational manoeuvre group
Strategy	List of military strategies and concepts Military campaign Attrition Counter-offensive Culminating Defence in depth Fabian Mosaic Deception Defensive Depth Goal Naval Offensive Scorched earth
Policy	Diplomacy: Alliances Peace treaty Cooperation United Nations Mediation Public policy: Conscription Defense budget Defense policy Related: Government Nation
Lists	Military lists Wars Weapons Military tactics History lists: Wars Battles Military occupations Operations Sieges Related lists: War crimes Writers
Other namespace	Templates ((War)) ((Weapons)) ((Ranks)) Vehicles and weapons ((Tanks)) ((Weapons)) ((Infantry fighting vehicles)) ((Modern warships)) ((Aircraft)) Specific modern wars ((Napoleonic Wars)) ((World War I)) ((World War II)) ((Cold War)) Categories Lists of wars by country Conflicts by time
Related	Peace Peace and conflict studies Peace movement Peace process Disarmament Pacifism Détente Global studies Conscientious objector Anti-war movement Idealism in international relations Humanitarianism International cooperation Crimes against humanity ((International relations)) Categories: Peace organizations
Category  Commons