Aide-de-camp in the context of "Chief of Defence Force (Singapore)"

Alexander Hamilton (January 11, 1755 or 1757 – July 12, 1804) was an Nevisian-born American military officer, statesman, and Founding Father who served as the first U.S. secretary of the treasury from 1789 to 1795 under the presidency of George Washington. He also founded America's first political party, the Federalist Party, in 1791.

Born out of wedlock in Charlestown, Nevis, Hamilton was orphaned as a child and taken in by a prosperous merchant. He was given a scholarship and pursued his education at King's College (now Columbia University) in New York City where, despite his young age, he was an anonymous but prolific and widely read pamphleteer and advocate for the American Revolution. He then served as an artillery officer in the American Revolutionary War, where he saw military action against the British Army in the New York and New Jersey campaign, served for four years as aide-de-camp to Continental Army commander in chief George Washington, and fought under Washington's command in the war's climactic battle, the Siege of Yorktown, which secured American victory in the war and with it the independence of the United States.

The title chief of staff (or head of staff) identifies the leader of a complex organization such as the armed forces, a government institution, or body of persons and it also may identify a principal staff officer (PSO), who is the coordinator of the supporting staff or a primary aide-de-camp to an important individual, such as a president, or a senior military officer, or leader of a large organization.

In general, a chief of staff provides a buffer between a chief executive and that executive's direct-reporting team. The chief of staff generally works behind the scenes to solve problems, mediate disputes, and deal with issues before they are brought to the chief executive. Often chiefs of staff act as a confidant and advisor to the chief executive, acting as a sounding board for ideas. Ultimately the actual duties depend on the position and the people involved. In an organization, the chief of staff may play a role that is metaphorically akin to an “air traffic controller for the leader and the senior team; as an integrator connecting work streams that would otherwise remain siloed; as a communicator linking the leadership team and the broader organization; as an honest broker and truth teller when the leader needs a wide-ranging view without turf considerations; and as a confidant without an organizational agenda.”

Field Marshal Arthur Wellesley, 1st Duke of Wellington (né Wesley; 1 May 1769 – 14 September 1852) was an Anglo-Irish British Army officer and statesman who was one of the leading military and political figures in Britain during the early 19th century, twice serving as Prime Minister of the United Kingdom. He was one of the British commanders who ended the Anglo-Mysore wars by defeating Tipu Sultan in 1799, and among those who ended the Napoleonic Wars in a Coalition victory when the Seventh Coalition defeated Napoleon at the Battle of Waterloo in 1815.

Wellesley was born into a Protestant Ascendancy family in Dublin, in the Kingdom of Ireland. He was commissioned as an ensign in the British Army in 1787, serving in Ireland as aide-de-camp to two successive lords lieutenant of Ireland. He was also elected as a member of Parliament in the Irish House of Commons. Rising to the rank of colonel by 1796, Wellesley served in the Flanders campaign before being sent to India, where he fought in the Fourth Anglo-Mysore War, ending the conflict with a victory at Seringapatam in 1799. He was appointed governor of Seringapatam and Mysore and, as a newly appointed major-general, won a decisive victory over the Maratha Confederacy at the Battle of Assaye in 1803.

Alfred Thaddeus Crane Pennyworth, originally Alfred Beagle and commonly known simply as Alfred, is a fictional character appearing in American comic books published by DC Comics, most commonly in association with the superhero Batman.

Alfred is depicted as Batman's meticulous, disciplined, loyal and tireless confidante, butler, legal guardian, best friend, aide-de-camp, and surrogate father figure following the murders of his parents, Thomas and Martha Wayne. As a British noble who is a classically trained butler, whose skills extend far beyond mere housekeeping, Alfred is uniquely suited to support the lives of masked crime fighters. A former British intelligence officer, field medic and retired Shakespearean actor operative of honor and ethics with connections within the intelligence community, he has been called "Batman's batman". He serves as Bruce's moral anchor while providing comic relief with his sardonic and cynical attitude; as an amnesiac, he has also served as the supervillainous Outsider. A vital part of the Batman mythos, Alfred was nominated for the Wizard Fan Award for Favorite Supporting Male Character in 1994. Bane killed Alfred in 2019 during the City of Bane storyline, and he remains dead in the primary continuity of the DC Universe as of 2025.

Grigory Yevseyevich Zinoviev (born Ovsei-Gershon Aronovich Radomyslsky; 23 September [O.S. 11 September] 1883 – 25 August 1936) was a Russian revolutionary and Soviet politician. A prominent Old Bolshevik, Zinoviev was a close associate of Vladimir Lenin prior to 1917 and a leading figure in the early Soviet government. He served as chairman of the Communist International (Comintern) from 1919 to 1926.

Zinoviev joined the Russian Social Democratic Labour Party in 1901 and sided with Vladimir Lenin's Bolsheviks in the party's 1903 split, forging a close political relationship with him. After participating in the failed Revolution of 1905, he served as Lenin's aide-de-camp in Europe. Zinoviev returned to Russia after the February Revolution of 1917 and joined with Lev Kamenev in opposing Lenin's "April Theses" and later the armed seizure of power which became the October Revolution. He lost the trust of Lenin, who began relying on Leon Trotsky. Zinoviev was nevertheless elected chairman of the Petrograd Soviet and the Comintern, and a full member of the Politburo in 1921.

Pavlo Petrovych Skoropadsky (Ukrainian: Павло Петрович Скоропадський; 15 May [O.S. 3 May] 1873 – 26 April 1945) was a Ukrainian aristocrat, military and state leader, who served as the hetman of the Ukrainian State throughout 1918 following a coup d'état in April 29 of the same year.

Born the son of a nobleman, he attended the Page Corps from which he came out an officer. After his service in the Russo-Japanese War, he was promoted to the rank of colonel, later in command of the 20th Finnish Dragoon Regiment in 1910. Skoropadsky would be promoted to major general and aide-de-camp of Nicholas II in 1912. During the First World War, he became a lieutenant general in charge of the 34th Army Corps.

George Catlett Marshall Jr. (31 December 1880 – 16 October 1959) was an American army officer and statesman. He rose through the United States Army to become Chief of Staff of the U.S. Army under presidents Franklin D. Roosevelt and Harry S. Truman, then served as Secretary of State and Secretary of Defense under Truman. Winston Churchill lauded Marshall as the "organizer of victory" for his leadership of the Allied victory in World War II. During the subsequent year, he unsuccessfully tried to prevent the continuation of the Chinese Civil War. As Secretary of State, Marshall advocated for a U.S. economic and political commitment to post-war European recovery, including the Marshall Plan that bore his name. In recognition of this work, he was awarded the Nobel Peace Prize in 1953, the only Army general ever to receive the honor.

Born in Uniontown, Pennsylvania, Marshall graduated from the Virginia Military Institute (VMI) in 1901. He received his commission as a second lieutenant of Infantry in February 1902 and immediately went to the Philippines. He served in the United States and overseas in positions of increasing rank, including platoon leader and company commander in the Philippines during the Philippine–American War. He was the top-ranked of the five Honor Graduates of his Infantry-Cavalry School Course in 1907 and graduated first in his 1908 Army Staff College class. In 1916 Marshall was assigned as aide-de-camp to J. Franklin Bell, the commander of the Western Department. After the nation entered the First World War in 1917, Marshall served with Bell, who commanded the Department of the East. He was assigned to the staff of the 1st Division; he assisted with the organization's mobilization and training in the United States, as well as planning of its combat operations in France. Subsequently assigned to the staff of the American Expeditionary Forces headquarters, he was a key planner of American operations, including the Meuse-Argonne Offensive.

William Petty Fitzmaurice, 1st Marquess of Lansdowne (2 May 1737 – 7 May 1805), known as the Earl of Shelburne between 1761 and 1784, by which title he is generally known to history, was an Anglo-Irish Whig statesman who was the first home secretary in 1782 and then prime minister in 1782–83 during the final months of the American War of Independence. He succeeded in securing peace with America and this feat remains his most notable legacy.

Lord Shelburne was born in Dublin and spent his formative years in Ireland. After attending Oxford University, he served in the British Army during the Seven Years' War. As a reward for his conduct at the Battle of Kloster Kampen, Shelburne was appointed an aide-de-camp to George III. He became involved in politics, becoming a member of parliament in 1760. After his father's death in 1761, he inherited his title and entered the House of Lords.