Military reserve in the context of "National Guard (France)"

Heavy cavalry was a class of cavalry intended to deliver a battlefield charge and also to act as a tactical reserve; they are also often termed shock cavalry. Although their equipment differed greatly depending on the region and historical period, heavy cavalry were generally mounted on large powerful warhorses, wore body armor, and armed with either lances, swords, maces, flails (disputed), battle axes, or war hammers; their mounts may also have been protected by barding. They were distinct from light cavalry, who were intended for raiding, reconnaissance, screening, skirmishing, patrolling, and tactical communications.

A counterattack is a tactic employed in response to an attack, with the term originating in "war games". The general objective is to negate or thwart the advantage gained by the enemy during attack, while the specific objectives typically seek to regain lost ground or destroy the attacking enemy (this may take the form of an opposing sports team or military units).

A counter-offensive is a broad-scale counterattack. The counter-offensive is executed after exhausting the enemy's frontline troops and after the enemy reserves had been committed to combat and proven incapable of breaching defenses, but before the enemy has had the opportunity to assume new defensive positions. Sometimes the counter-offensive can be of a more limited operational maneuver nature, with more limited objectives rather than those seeking attainment of a strategic goal. A counter-offensive was considered by Clausewitz to be the most efficient means of forcing the attacker to abandon offensive plans. Counter-offensives can be executed not only on land, but also by the naval, and air forces. Strategic counter-offensives have been recorded by military historians in many wars throughout military history. Although not always known as such, because they are usually described by historians in conjunction with the defensive phase, such as the Battle of Moscow.

A penal military unit, also known as a penal formation, disciplinary unit, or just penal unit (usually named for their formation and size, such as penal battalion for battalions, penal regiment for regiments, penal company for companies, etc.), is a military formation consisting of convicts mobilized for military service. Such formations may consist of military prisoners convicted under military law, civilian prisoners convicted in civilian courts, prisoners of war who have chosen to side with their captors, or a combination of these groups.

Service in penal military units is generally considered a form of punishment, discipline, or penal labour, used in lieu of, or offered as an alternative to, imprisonment or capital punishment. Penal units have historically been used as disposable cannon fodder, treated poorly or with little regard and used in compromising or dangerous situations (commonly suicide missions such as demining or forlorn hope advance parties), as march battalions that maintain replacement personnel as reserves, or kept in the rear for military operations other than war or menial labour relating to the war effort, guarded and overseen by regular military units, military police, or barrier troops to ensure they do not attempt to escape, retreat, or mutiny. However, this is not always the case: some penal units are treated the same as regular units and, depending on military organization, a dedicated penal unit may not exist at all, with convicts instead being placed in a regular unit. Rewards and incentives for convicts to serve in a penal unit vary—often expungement, commutation, stay of execution, or a pardon—though penal units used as punishment typically lack those by nature.

Trinidad Anastasio de Sales Ruiz Bustamante y Oseguera (Spanish pronunciation: [anasˈtasjo βustaˈmante]; 27 July 1780 – 6 February 1853) was a Mexican physician, general, and politician who served as the 4th President of Mexico three times from 1830 to 1832, 1837 to 1839, and 1839 to 1841. He also served as the 2nd Vice President of Mexico from 1829 to 1832 under Presidents Vicente Guerrero, José María Bocanegra, himself, and Melchor Múzquiz. He participated in the Mexican War of Independence initially as a royalist before siding with Agustín de Iturbide and supporting the Plan of Iguala.

Bustamante was a member of the Provisional Government Junta, the first governing body of Mexico. After the fall of the First Mexican Empire, his support for Emperor Iturbide was pardoned by President Guadalupe Victoria. The controversial 1828 general election sparked riots forcing the results to be nullified, as a result, Congress named him vice president while the liberal Vicente Guerrero was named president. Bustamante's command of a military reserve during the Barradas Expedition in 1829 allowed him to launch a coup d'état ousting Guerrero.

The Ulster Special Constabulary (USC; commonly called the "B-Specials" or "B Men") was a quasi-military reserve special constable police force in what would later become Northern Ireland. It was set up in October 1920, shortly before the partition of Ireland. The USC was an armed corps, organised partially on military lines and called out in times of emergency, such as war or insurgency. It performed this role most notably in the early 1920s during the Irish War of Independence and the 1956–1962 IRA Border Campaign.

During its existence, 95 USC members were killed in the line of duty. Most of these (72) were killed in conflict with the IRA in 1921 and 1922. Another 8 died during the Second World War, in air raids or IRA attacks. Of the remainder, most died in accidents but two former officers were killed during the Troubles in the 1980s.

The Islamic Republic of Iran Armed Forces, also known as Iranian Armed Forces, are the combined military forces of Iran, comprising the Islamic Republic of Iran Army (Artesh), the Police Command (Faraja) and the Islamic Revolutionary Guard Corps (Sepah).

Iranian Armed Forces are the largest in the Middle East in terms of active troops. Iran's military forces are made up of approximately 610,000 active-duty personnel plus 350,000 reserve and trained personnel that can be mobilized when needed, bringing the country's military manpower to about 960,000 total personnel. These numbers do not include Law Enforcement Command or Basij.