Soldier in the context of "Army"

Synecdoche (/sɪˈnɛkdəki/ sih-NECK-də-kee) is a type of metonymy; it is a figure of speech that uses a term for a part of something to refer to the whole (pars pro toto), or vice versa (totum pro parte). The term is derived from Ancient Greek συνεκδοχή (sunekdokhḗ) 'simultaneous understanding'. Common English synecdoches include suits for businessmen, wheels for automobile, and boots for soldiers.

Infantry, or infantryman are a type of soldier who specialize in ground combat, typically fighting dismounted. Historically the term was used to describe foot soldiers, i.e. those who march and fight on foot. In modern usage, the term broadly encompasses a wide variety of subspecialties, including light infantry, irregular infantry, heavy infantry, mountain infantry, motorized infantry, mechanized infantry, airborne infantry, air assault infantry, and naval infantry. Other subtypes of infantry, such as line infantry and mounted infantry, were once commonplace but fell out of favor in the 19th century with the invention of more accurate and powerful weapons.

Historically, cavalry (from the French word cavalerie, itself derived from cheval meaning "horse") are groups of soldiers or warriors who fight mounted on horseback. Until the 20th century, cavalry were the most mobile of the combat arms, operating as light cavalry in the roles of reconnaissance, screening, and skirmishing, or as heavy cavalry for decisive economy of force and shock attacks. An individual soldier in the cavalry is known by a number of designations depending on era and tactics, such as a cavalryman, horseman, trooper, cataphract, knight, drabant, hussar, uhlan, mamluk, cuirassier, lancer, dragoon, samurai or horse archer. The designation of cavalry was not usually given to any military forces that used other animals or platforms for mounts, such as chariots, camels or elephants. Infantry who moved on horseback, but dismounted to fight on foot, were known in the early 17th to the early 18th century as dragoons, a class of mounted infantry which in most armies later evolved into standard cavalry while retaining their historic designation.

Cavalry had the advantage of improved mobility, and a soldier fighting from horseback also had the advantages of greater height, speed, and inertial mass over an opponent on foot. Another element of horse mounted warfare is the psychological impact a mounted soldier can inflict on an opponent.

Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the leopard's spotted coat, the battledress of a modern soldier, and the leaf-mimic katydid's wings. A third approach, motion dazzle, confuses the observer with a conspicuous pattern, making the object visible but momentarily harder to locate. The majority of camouflage methods aim for crypsis, often through a general resemblance to the background, high contrast disruptive coloration, eliminating shadow, and countershading. In the open ocean, where there is no background, the principal methods of camouflage are transparency, silvering, and countershading, while the ability to produce light is among other things used for counter-illumination on the undersides of cephalopods such as squid. Some animals, such as chameleons and octopuses, are capable of actively changing their skin pattern and colours, whether for camouflage or for signalling. It is possible that some plants use camouflage to evade being eaten by herbivores.

Military camouflage was spurred by the increasing range and accuracy of firearms in the 19th century. In particular the replacement of the inaccurate musket with the rifle made personal concealment in battle a survival skill. In the 20th century, military camouflage developed rapidly, especially during the World War I. On land, artists such as André Mare designed camouflage schemes and observation posts disguised as trees. At sea, merchant ships and troop carriers were painted in dazzle patterns that were highly visible, but designed to confuse enemy submarines as to the target's speed, range, and heading. During and after World War II, a variety of camouflage schemes were used for aircraft and for ground vehicles in different theatres of war. The use of radar since the mid-20th century has largely made camouflage for fixed-wing military aircraft obsolete.

Peacekeeping comprises activities intended to create conditions that favor lasting peace. Research generally finds that peacekeeping reduces civilian and battlefield deaths, as well as reduces the risk of renewed warfare.

Within the United Nations (UN) group of nation state governments and organizations, there is a general understanding that at the international level, peacekeepers monitor and observe peace processes in post-conflict areas, and may assist ex-combatants in implementing peace agreement commitments that they have undertaken. Such assistance may come in many forms, including confidence-building measures, power-sharing arrangements, electoral support, strengthening the rule of law, and economic and social development. Accordingly, the UN peacekeepers (often referred to as Blue Berets or Blue Helmets because of their light blue berets or helmets) can include soldiers, police officers, and civilian personnel.

The Geneva Conventions is a term used to collectively refer to the four Geneva Conventions of 1949 along with their two optional protocols (Additional Protocols I and II), which form the core of international humanitarian law and establish international legal standards for the treatment of non-combatants in war. Negotiated in the aftermath of the World War II, the Geneva Conventions of 1949 consist of four agreements, which replaced three earlier humanitarian conventions of 1906 and 1929 and added two new conventions. The First Geneva Convention addresses the treatment of sick and wounded field soldiers, Second Geneva Convention addresses the treatment of sick and wounded sailors, Third Geneva Convention addresses the treatment of prisoners or war, and Fourth Geneva Convention addresses the treatment of civilians during armed conflict.

Aside from the UN Charter, the Geneva Conventions are among the most widely ratified international agreements. The 1949 conventions were ratified, in their entirety or with reservations, by 196 countries. Much of the international humanitarian law contained in the Geneva Conventions has become customary international law, and therefore would apply to all states and non-state armed groups, even those that are not a party to the Geneva Conventions. The legal obligations created under the Geneva Conventions are somewhat different from other international treaties in that a breach of the Geneva Conventions by one party does not furnish a directly affected party with the option to cease complying with its treaty obligations.

Modern warfare is warfare that diverges notably from previous military concepts, methods, and technology, emphasizing how combatants must modernize to preserve their battle worthiness. As such, it is an evolving subject, seen differently in different times and places. In its narrowest sense, it is merely a synonym for contemporary warfare.

In its widest sense, it includes all warfare since the "gunpowder revolution" that marks the start of early modern warfare, but other landmark military developments have been used instead, including the emphasis of artillery marked by the Crimean War, the military reliance on railways beginning with the American Civil War, the launch of the first dreadnought in 1905, or the use of the machine gun, aircraft, tank, or radio in World War I.

A legal norm is a binding rule or principle, or norm, that organizations of sovereign power promulgate and enforce in order to regulate social relations. Legal norms determine the rights and duties of individuals who are the subjects of legal relations within the governing jurisdiction at a given point in time. Some theorists, such as Stephen Krasner, define norms as “standards of behavior defined in terms of rights and obligations.” Competent state authorities issue and publish basic aspects of legal norms through a collection of laws that individuals under that government must abide by, which is further guaranteed by state coercion. There are two categories of legal norms: normativity, which regulates the conduct of people, and generality, which is binding on an indefinite number of people and cases. Diplomatic and legislative immunity refers to instances where legal norms are constructed to be targeted towards a minority and are specifically only binding on them, such as soldiers and public officials.

In a legal sense, retroactivity refers to a law that impairs or invalidates the vested rights of an individual acquired under existing laws by creating new obligations to considerations that have been pre-established. Legal norms can either classify under true retroactivity, where norms influence the legal relations that have existed before its effect, or pseudo retroactivity, referring to how the validity of old legal relations can be influenced by derogated norms.