Weapon in the context of Rate of fire

A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. Militaries are typically authorized and maintained by a sovereign state, with their members identifiable by a distinct military uniform. They may consist of one or more military branches such as an army, navy, air force, space force, marines, or coast guard. The main task of a military is usually defined as defence of their state and its interests against external armed threats.

In broad usage, the terms "armed forces" and "military" are often synonymous, although in technical usage a distinction is sometimes made in which a country's armed forces may include other paramilitary forces such as armed police.

Repatriation is the return of the cultural property, often referring to ancient or looted art, to their country of origin or former owners (or their heirs).

The disputed cultural property items are physical artifacts of a group or society taken by another group, usually in the act of looting, whether in the context of imperialism, colonialism, or war. The contested objects vary widely and include sculptures, paintings, monuments, objects such as tools or weapons for purposes of anthropological study, and human remains.

The military nature of Mycenaean Greece (c. 1800–1050 BC) in the Late Bronze Age is evident by the numerous weapons unearthed, warrior and combat representations in contemporary art, as well as by the preserved Greek Linear B records. The Mycenaeans invested in the development of military infrastructure with military production and logistics being supervised directly from the palatial centres.

Late Bronze Age Greece was divided into a series of warrior kingdoms, the most important being centered in Mycenae, to which the culture of this era owes its name, Tiryns, Pylos and Thebes. From the 15th century BC, Mycenaean power started expanding towards the Aegean, the Anatolian coast and Cyprus. Mycenaean armies shared several common features with other contemporary Late Bronze Age powers: they were initially based on heavy infantry, with spears, large shields and in some occasions armor. In the 13th century BC, Mycenaean units underwent a transformation in tactics and weaponry and became more uniform and flexible and their weapons became smaller and lighter. Some representative types of Mycenaean armor/weapons were the boar's tusk helmet and the "Figure-of-eight" shield. Moreover, most features of the later hoplite panoply of Classical Greece were already known at this time.

A tool is an object that can extend an individual's ability to modify features of the surrounding environment or help them accomplish a particular task, and proto-typically refers to solid hand-operated non-biological objects with a single broad purpose that lack multiple functions, unlike machines or computers. Although human beings are proportionally most active in using and making tools in the animal kingdom, as use of stone tools dates back hundreds of millennia, and also in using tools to make other tools, many animals have demonstrated tool use in both instances.

Early human tools, made of such materials as stone, bone, and wood, were used for the preparation of food, hunting, the manufacture of weapons, and the working of materials to produce clothing and useful artifacts and crafts such as pottery, along with the construction of housing, businesses, infrastructure, and transportation. The development of metalworking made additional types of tools possible. Harnessing energy sources, such as animal power, wind, or steam, allowed increasingly complex tools to produce an even larger range of items, with the Industrial Revolution marking an inflection point in the use of tools. The introduction of widespread automation in the 19th and 20th centuries allowed tools to operate with minimal human supervision, further increasing the productivity of human labor.

Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to its high elastic modulus, yield strength, fracture strength and low raw material cost, steel is one of the most commonly manufactured materials in the world. Steel is used in structures (as concrete reinforcing rods or steel beams), in bridges, infrastructure, tools, ships, trains, cars, bicycles, machines, electrical appliances, furniture, and weapons.

Iron is always the main element in steel, but other elements are used to produce various grades of steel, demonstrating altered material, mechanical, and microstructural properties. Stainless steels, for example, typically contain 18% chromium and exhibit improved corrosion and oxidation resistance versus their carbon steel counterpart. Galvanized steel is coated in a layer of zinc to achieve a similar effect. Under atmospheric pressures, steels generally take on two crystalline forms: body-centered cubic and face-centered cubic; however, depending on the thermal history and alloying, the microstructure may contain the distorted martensite phase or the carbon-rich cementite phase, which are tetragonal and orthorhombic, respectively. In the case of alloyed iron, the strengthening is primarily due to the introduction of carbon in the primarily-iron lattice, inhibiting deformation under mechanical stress. Alloying may also induce additional phases that affect the mechanical properties. In most cases, the engineered mechanical properties are at the expense of the ductility and elongation of the pure iron state, which decrease upon the addition of carbon.

Iron is a chemical element; it has symbol Fe (from Latin ferrum 'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most abundant element in the Earth's crust. In its metallic state it was mainly deposited by meteorites.

Extracting usable metal from iron ores requires kilns or furnaces capable of reaching 1,500 °C (2,730 °F), about 500 °C (900 °F) higher than that required to smelt copper. Humans started to master that process in Eurasia during the 2nd millennium BC and the use of iron tools and weapons began to displace copper alloys – in some regions, only around 1200 BC. That event is considered the transition from the Bronze Age to the Iron Age. In the modern world, iron alloys, such as steel, stainless steel, cast iron and special steels, are by far the most common industrial metals, due to their mechanical properties and low cost. The iron and steel industry is thus very important economically, and iron is the cheapest metal, with a price of a few dollars per kilogram or pound.

A gun barrel is a crucial part of gun-type weapons such as small firearms, artillery pieces, and air guns. It is the straight shooting tube, usually made of rigid high-strength metal, through which a contained rapid expansion of high-pressure gas(es) is used to propel a projectile out of the front end (muzzle) at a high velocity. The hollow interior of the barrel is called the bore, and the diameter of the bore is called its calibre, usually measured in inches or millimetres.

The first firearms were made at a time when metallurgy was not advanced enough to cast tubes capable of withstanding the explosive forces of early cannons, so the pipe (often built from staves of metal) needed to be braced periodically along its length for structural reinforcement, producing an appearance somewhat reminiscent of storage barrels being stacked together, hence the English name.

A knife (pl.: knives; from Old Norse knifr 'knife, dirk') is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have fixed or folding blades, with styles varying by maker and country.

Knives can serve various purposes. Hunters use a hunting knife, soldiers use the combat knife, scouts, campers, and hikers carry a pocketknife; there are kitchen knives for preparing foods (the chef's knife, the paring knife, bread knife, cleaver), table knife (butter knives and steak knives), weapons (daggers or switchblades), knives for throwing or juggling, and knives for religious ceremony or display (the kirpan).

A weapon dance employs weapons—or stylized versions of weapons—traditionally used in combat in order to simulate, recall, or reenact combat or the moves of combat in the form of dance, usually for some ceremonial purpose. Such dancing is quite common to folk ritual in many parts of the world. Weapon dancing is certainly ancient; among the earliest historical references we have are those that refer to the pyrrhichios, a weapon dance in ancient Sparta, in which the dance was used as a kind of ritual training for battle.

Related to weapon dances and war dances is the dance of the hunt. A very early reference to a weapon dance of the hunt comes in the form of a rock carving at Çatal Höyük, the large neolithic settlement in south-central Anatolia. It depicts a hunting ritual involving dancers holding their bows; one figure has a bow in each hand, two perform artistic leaps and another holds a horn-shaped stick and is striking a frame drum.

Combat is a purposeful violent conflict between multiple combatants with the intent to harm the opposition. Combat may be armed (using weapons) or unarmed (not using weapons). Combat is resorted to either as a method of self-defense or to impose one's will upon others. An instance of combat can be a standalone confrontation or part of a wider conflict, and its scale can range from a fight between individuals to a war between organized groups. Combat may also be benign and recreational, as in the cases of combat sports and mock combat.

Combat may comply with, or be in violation of, local or international laws regarding conflict. Examples of rules include the Geneva Conventions (covering the treatment of people in war), medieval chivalry, the Marquess of Queensberry Rules (covering boxing), and the individual rulesets of various combat sports.

An arms race occurs when two or more groups compete in military superiority. It consists of a competition between two or more states to have superior armed forces, concerning production of weapons, the growth of a military, and the aim of superior military technology. Unlike a sporting race, which constitutes a specific event with winning interpretable as the outcome of a singular project, arms races constitute spiralling systems of on-going and potentially open-ended behavior.

The existing scholarly literature is divided as to whether arms races correlate with war. International-relations scholars explain arms races in terms of the security dilemma, engineering spiral models, states with revisionist aims, and deterrence models.

The right to keep and bear arms (often referred to as the right to bear arms) is a legal right for people to possess weapons (arms) for the preservation of life, liberty, and property. The purpose of gun rights is for self-defense, as well as hunting and sporting activities. Countries that guarantee a right to keep and bear arms include Albania, the Czech Republic, Guatemala, Mexico, Switzerland, the United States and Yemen.

The arms industry, also known as the defense (or defence) industry or military industry is a global industry which manufactures and sells weapons and other military technology to a variety of customers, including the armed forces of states and civilian individuals and organizations. Products of the arms industry include weapons, munitions, weapons platforms, communications systems, and other electronics, and related equipment. The arms industry also provides defense-related services, such as logistical and operational support. As a matter of policy, many governments of industrialized countries maintain or support a network of organizations, facilities, and resources to produce weapons and equipment for their military forces (and sometimes those of other countries). This is often referred to as a defense industrial base. Entities involved in arms production for military purposes vary widely, and include private sector commercial firms, state-owned enterprises and public sector organizations, and scientific and academic institutions. Such entities perform a wide variety of functions, including research and development, engineering, production, and servicing of military material, equipment, and facilities. The weapons they produce are often made, maintained, and stored in arsenals.

In some regions of the world, there is a substantial legal trade in firearms for use by individuals (commonly cited purposes include self-defense and hunting/sporting). Illegal small arms trade occurs in many countries and regions affected by political instability.

Materiel or matériel (/məˌtɪəriˈɛl/; from French matériel 'equipment, hardware') is supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commercial supply chain context.

An arsenal is a place where arms and ammunition are made, maintained and repaired, stored, or issued, in any combination, whether privately or publicly owned. Arsenal and armoury (British English) or armory (American English) are mostly regarded as synonyms, although subtle differences in usage exist.

A sub-armory is a place of temporary storage or carrying of weapons and ammunition, such as any temporary post or patrol vehicle that is only operational in certain times of the day.

A baton (also truncheon, nightstick, billy club, billystick, cosh, lathi, or simply stick) is a roughly cylindrical club made of wood, rubber, plastic, or metal. It is carried as a compliance tool and defensive weapon by law-enforcement officers, correctional staff, security guards and military personnel. The name baton comes from the French bâton (stick), derived from Old French Baston, from Latin bastum.

As a weapon a baton may be used defensively (to block) or offensively (to strike, jab, or bludgeon), and it can aid in the application of armlocks. The usual striking or bludgeoning action is not produced by a simple and direct hit, as with an ordinary blunt object, but rather by bringing the arm down sharply while allowing the truncheon to pivot nearly freely forward and downward, so moving its tip much faster than its handle. Batons are also used for non-weapon purposes such as breaking windows to free individuals trapped in a vehicle, or turning out a suspect's pockets during a search (as a precaution against sharp objects).

Ammunition, also known as ammo, is the material fired, scattered, dropped, or detonated from any weapon or weapon system. The term Ammunition includes both expendable weapons (e.g., bombs, missiles, grenades, land mines), and the component parts of other weapons that create the effect on a target (e.g., bullets and warheads).

The purpose of ammunition is to project a force against a selected target to have an effect (usually, but not always, lethal). An example of ammunition is the firearm cartridge, which includes all components required to deliver the weapon effect in a single package. Until the 20th century, black powder was the most common propellant used but has now been replaced in nearly all cases by modern compounds.