An aide-de-camp (; ; plural: aides-de-camp) is a personal assistant or secretary to a person of high rank, usually a senior military, police or government officer, or to a member of a royal family or a head of state. The term comes from a French expression meaning "helper in the military camp".

An aide-de-camp may participate at ceremonial functions, and the first aide-de-camp is typically the foremost personal aide. This is not to be confused with an adjutant, who is the senior administrator of a military unit.

The badge of office for an aide-de-camp is usually the aiguillette, a braided cord in gold or other colours, worn on the shoulder of a uniform. Whether it is worn on the left or the right shoulder is dictated by protocol.

In some countries, aide-de-camp is considered to be a title of honour, which confers the post-nominal letters ADC or A de C.

Argentina

In Argentina, three officers, one from each armed service, of the rank of lieutenant colonel or its equivalent, are appointed as aide-de-camp to the president of the republic and three others to the minister of defence, these six being the only ones to be called , which is one Spanish translation for aide-de-camp ( is a phonetic rendition of the French term; or is a calque).

A controversy was raised in 2006, when president Néstor Kirchner promoted his army aide-de-camp, Lieutenant Colonel Graham, to colonel, one year ahead of his class. Upon becoming president, Cristina Kirchner decided to have, for the first time, female officers as her aides-de-camp.

In each of the armed forces, the chief of staff and other senior officers have their own adjutants, normally of the rank of major or lieutenant colonel, or its equivalent. At unit level, the unit S1 (personnel officer) doubles as the unit commander's adjutant, although in recent times in many units this practice has been left only for ceremonial purposes, while for everyday duties a senior non-commissioned officer performs the adjutant's activities.

An aiguillette is worn on the right shoulder by aides-de-camp and adjutants as a symbol of their position, the colour of the aiguillette depending on the rank of the person they are serving (there are golden, tan, silver and red aiguillettes, as well as an olive-green one for combat uniform).

Belgium In Belgium, the Head of the King's Military Household is a two, three or four-star General who helps the King exercise the powers vested in him by the constitution in the field of defence. He monitors the international security situation and informs the King accordingly. He keeps the King posted of the situation, means and resources, functioning and missions of the Belgian Armed Forces, in close cooperation with the King's Cabinet. The Head of the Military Household also oversees the coordination with the security detail of the Royal Palace and runs the Information Technology Service.

The Aides de Camp to the King are general or senior officers assigned by the King to accompany important visitors or to represent him on occasions when he cannot be present himself.

The Equerries to the King are at the King's constant disposal on a rotational basis; they accompany him on his travels and assist him in performing his daily tasks.Belgian Monarchy website, Royal Household, Military Household

The title of honorary aide-de-camp to the king can be granted by the royal court for services rendered. Notable people include Major General Baron Édouard Empain, Count Charles John d'Oultremont, and Lieutenant General Baron Albert du Roy de Blicquy.

Commonwealth of Nations countries

In Commonwealth of Nations countries, aides-de-camp are mostly appointed from military or auxiliary services. They are entitled to use the letters ADC or A de C after their names. The emblem of the office is the aiguillette worn on their uniform.

Australia

In Australia, Australian Defence Force officers serve as aides-de-camp to specific senior appointments, such as the monarch, governor-general, state governors, chief of the Defence Force, and other specified Army, Navy and Air Force command appointments. Honorary aides-de-camp to the governor-general or state governors are entitled to the post-nominal ADC during their appointment.

Officers of and above the ranks of rear admiral, major general, and air vice-marshal in specifically designated command appointments are entitled to an aide-de-camp with the army rank of captain (or equivalent). Within the navy, an aide-de-camp is called a "flag lieutenant" and senior naval officers are called "flag officers".

Bangladesh In Bangladesh, an aide-de-camp (ADC) is a commissioned military officer appointed to assist a senior military or state official in official, ceremonial, administrative, and liaison duties. Officers of the Bangladesh Army, Bangladesh Navy, and Bangladesh Air Force may serve as aides-de-camp to designated senior appointments. ADCs may accompany their principals during official engagements, military ceremonies, state functions, inspections, and other formal occasions. The position is also used within the Bangladesh Armed Forces for senior military appointments, including corps and divisional commanders.

The Bangladesh Army regulations provide for an ADC to the Chief of Army Staff, as well as ADCs to corps commanders and infantry and armoured division commanders. The regulations specify an ADC to the Chief of Army Staff at the rank of captain, while ADCs to corps and division commanders may be appointed from the rank of captain or junior commissioned officer, depending on the appointment.

The regulations also provide for military secretaries and ADCs to the President and Prime Minister. Their normal tenure is two years, with the possibility of an extension of one additional year in special cases. Officers below the rank of major general, as well as officers of the Regular or Supplementary Reserve who have rendered distinguished service, may also be appointed as honorary aides-de-camp to the President. Such honorary appointments terminate when the President relinquishes office.

The appointment has also been held by notable Bangladeshi military officers during their careers. For example, General Abu Belal Muhammad Shafiul Haque served as ADC to the President of Bangladesh before later becoming Chief of Army Staff. During the Bangladesh Liberation War, Sheikh Kamal served as aide-de-camp to General M. A. G. Osmani, the Commander-in-Chief of the Bangladesh Liberation Forces.

Bermuda

In 1973, Sir Richard Sharples, then governor of Bermuda, and his aide-de-camp, Captain Hugh Sayers, were murdered on the grounds of Government House.

Canada

Aides-de-camp in Canada are appointed to the monarch and some members of the royal family, the governor general, lieutenant governors, and to certain other appointments (e.g., Minister of National Defence, flag and general officers, Canadian heads of mission, foreign heads of state visiting Canada).

In addition to the military officers appointed as full-time aides-de-camp to the governor general, several other flag, general, and senior officers are appointed ex officio as honorary aides-de-camp to the governor general or members of the royal family including: Chief of the Defence Staff Commandant of the Royal Military College of Canada A senior officer of the Quebec-based Royal 22e Régiment Commanding officer, the Governor General's Horse Guards Commanding officer, Governor General's Foot Guards Commanding officer, the Canadian Grenadier Guards Commanding officer, the Queen's Own Rifles of Canada Commanding officers of Naval Reserve divisions

Most aides-de-camp wear a gold-pattern aiguillette when acting in their official capacity; however, members of St. John Ambulance Canada wear silver aiguillettes consistent with their other accoutrements as aides-de-camp. All aides-de-camp also wear the cypher or badge of the principal to whom they are appointed. Honorary appointees to the monarch, King Charles III, or the Prince of Wales, wear the appropriate cypher on their uniform epaulette and are entitled to use the post-nominal letters ADC for the duration of their appointment.

Aides-de-camp to the governor general wear the governor general's badge, known as the crest of the arms of Canada, and aides-de-camp to a lieutenant-governor wear the lieutenant-governor's badge (the shield of the province surmounted by a crown). They are appointed from officers of the Canadian Forces. Aides-de-camp to lieutenant-governors are appointed from officers of the Canadian Forces, Royal Canadian Mounted Police and, depending on the province, aides may also be appointed from other uniformed organizations such as municipal or provincial police and emergency services. In certain instances, civilians may be appointed. Non-uniformed civilians do not wear the aiguillette, but do wear their lieutenant-governor's badge as a symbol of their appointment. On 29 November 1973, Governor General Roland Michener concluded his initiative to permit aides-de-camp to the governor general and lieutenant-governors to use the post-nominal letters A de C for the duration of their appointment.

Aides-de-camp to royal and vice-regal personages wear the aiguillette on the right shoulder. Aides-de-camp to all others wear their aiguillette on the left shoulder.

India

In India, officers of the rank of major general and equivalent and above in the sister services who are in command of divisions or of peacetime commands have aides-de-camp who usually belong to their general's parent regiment/battalion. There have been instances where the sons have served a tenure of aide-de-camp to their fathers. In India, aide-de-camp is a title of honour, and current as well as former aides-de-camp are conferred the post-nominal letters ADC.

The service chiefs, including the chief of the Army, Navy, and Air Staff, usually have three aides-de-camp and the president of India has five aides-de-camp (three from the Army and one each from the Navy and the Air Force). There is also one honorary aide-de-camp from the Territorial Army. The president may appoint any distinguished officer from the armed forces including the service chiefs as honorary aide-de-camp. The governors of the states have two aides-de-camp, one each from the Indian Armed Forces and the Indian and state police services except for the state of Jammu and Kashmir, where both the aides-de-camp to the governor are appointed from the Indian Army.

Malaysia An aide-de-camp or adikung as known locally in Malaysia is appointed by the federal government or the state government from officers of the Royal Malaysian Police or from the Malaysian Armed Forces officers comprising the Malaysian Army, Royal Malaysian Air Force or from Royal Malaysian Navy. There were also non-military or police officers who were appointed as aide-de-camp.

New Zealand As in other Commonwealth countries where the monarch is head of state, personnel from the New Zealand Defence Force serve as aides-de-camp to royal and vice-regal personages. The governor-general of New Zealand has two full-time aides-de-camp of the rank of army captain, lieutenant RNZN or RNZAF flight lieutenant. Additional and honorary aides-de-camp to the governor-general are of the rank of lieutenant colonel or equivalent. Aiguillettes are of the standard palace  1 type and worn on the right shoulder. Equivalent appointments also serve the minister of Defence, the chief of Defence Force and service chiefs. These are usually known as military assistants (MA) personal staff officers (PSOs) or, in the case of the RNZN, flag lieutenant (flags), and wear service-specific  2 aiguillettes with coloured flecks (dark blue for navy, red for army and light blue for air force) on the left shoulder.

Pakistan