Chain of command in the context of "United States Secretary of Defense"

A ministry of defence or defense (see spelling differences), also known as a department of defence or defense, is the part of a government responsible for matters of defence and military forces, found in states where the government is divided into ministries or departments. Such a department usually includes all branches of the military, and is usually controlled by a defence minister or secretary of defense.

The role of a defence minister varies considerably from country to country; in some the minister is only in charge of general budget matters and procurement of equipment, while in others they are also an integral part of the operational military chain of command.

Brigandage is the life and practice of highway robbery and plunder. It is practiced by a brigand, a person who is typically part of a gang and lives by pillage and robbery.

The word brigand entered English as brigant via French from Italian as early as 1400. Under the laws of war, soldiers acting on their own recognizance without operating in chain of command are brigands, liable to be tried under civilian laws as common criminals. However, on occasions brigands are not mere malefactors, but may be rebels against a state or union perceived as the enemy.

Plausible deniability is a social tactic that allows people to deny knowledge, participation, or an active role in carrying out an activity, relaying a loaded message, etc. The deniability exists due to a lack of culpable evidence, or more commonly, from multiple plausible intrepretations of the present evidence. Plausible deniablity is prime shield of defense against accountability, and forms the basis of covert attacks that make up human social behavior.

In a chain of command, senior officials can deny knowledge or responsibility for actions committed by or on behalf of members of their organizational hierarchy. They may do so because of a lack of evidence that can confirm their participation, even if they were personally involved in or at least willfully ignorant of the actions. If illegal or otherwise disreputable and unpopular activities become public, high-ranking officials may deny any awareness of such acts to insulate themselves and shift the blame onto the agents who carried out the acts, as they are confident that their doubters will be unable to prove otherwise. The lack of evidence to the contrary ostensibly makes the denial plausible (credible), but sometimes, it makes any accusations only unactionable.

The United States Department of the Army Criminal Investigation Division (CID or DACID), previously known as the United States Army Criminal Investigation Command (USACIDC), is the primary federal law enforcement agency of the United States Department of the Army. Its primary function is to investigate felony crimes and serious violations of military law and the United States Code within the US Army. The division is an independent federal law enforcement agency with investigative autonomy; CID special agents, both military and civilian, report through the CID chain of command to the CID Director, who reports directly to the Under Secretary of the Army and the Secretary of the Army. Unlike their counterparts at OSI and NCIS, Army CID does not have primary counterintelligence responsibilities, as this jurisdiction resides with United States Army Counterintelligence Command (ACI).

USACIDC was established as a United States Army command in 1971 and is headquartered at Marine Corps Base, Quantico, Virginia. Worldwide, the organization has slightly fewer than 3,000 soldiers and civilians, of whom approximately 900 are special agents. The initialism "USACIDC" was used to refer to the Army command itself, while criminal investigation personnel and operations are commonly referred to using the shortened initialism "CID", which has its history in the original Criminal Investigation Division formed during World War I. The name restoration to Criminal Investigation Division became official after 2021 reform.

The Australian Defence Force (ADF) is the military organisation responsible for the defence of Australia and its national interests. It consists of three services: the Royal Australian Navy (RAN), the Australian Army and the Royal Australian Air Force (RAAF). The ADF has a strength of just over 90,000 personnel and is supported by the Department of Defence alongside other civilian entities also members of the Australian Defence Organisation.

During the first decades of the 20th century, the Australian Government established the armed services as separate organisations, with each service having an independent chain of command. In 1976, the government made a strategic change and established the ADF to place the services under a single headquarters. Over time, the degree of integration has increased, and tri-service headquarters, logistics, and training institutions have supplanted many single-service establishments. The ADF has been deployed around the world in combat, peacekeeping and disaster-relief missions.

A crew is a body or a group of people who work at a common activity, generally in a structured or hierarchical organization. A location in which a crew works is called a crewyard or a workyard. The word has nautical resonances: the tasks involved in operating a ship, particularly a sailing ship, providing numerous specialities within a ship's crew, often organised with a chain of command. Traditional nautical usage strongly distinguishes officers from crew, though the two groups combined form the ship's company. Members of a crew are often referred to by the titles crewmate, crewman or crew-member.