Kang Mun-bong (October 26, 1923 – February 26, 1988) was a South Korean military officer.
 He knew a great deal about Korean history, specifically as it pertains to the military.
James Maitland "Jimmy" Stewart (May 20, 1908July 2, 1997) was an American actor and military officer who is among the most honored and popular stars in film history.
 A major Metro-Goldwyn-Mayer contract player, Stewart was known for his distinctive drawl and down-to-earth persona, which helped him often portray American middle-class men struggling in crisis.
 Many of the films he starred in have become enduring classics.
James Moncrief (1741 in Scotland – 1793 in Ostend, Flanders) was a trained engineer and military officer of Scottish Highlander descent in the British Royal Engineers.
 Moncrief graduated from the Royal Military Academy at Woolwich, England in 1762 at the age of 21 and would become a career military man who would rise to the rank of colonel.
 He saw extensive service in the American colonies in the late 18th century and upon Britain's takeover of Spanish Florida in 1763, he drafted a current map of St. Augustine the capital of East Florida, and its defenses while serving under military governor James Grant.
Angus William McDonald (February 14, 1799 – December 1, 1864) was a 19th-century American military officer and lawyer in the U.S. state of Virginia.
 He also served as a colonel in command of the Confederate States Army's 7th Virginia Cavalry during the American Civil War.
 McDonald was appointed to serve in a number of prominent political positions including a superintendent overseeing the construction of the Northwestern Turnpike and a commissioner representing Virginia in its boundary dispute with Maryland.
 McDonald was the grandson of Virginia military officer and frontiersman, Angus McDonald (1727–1778) and the father of United States Fish Commissioner Marshall McDonald (1835–1895).
Oliver Patton Echols (March 4, 1892 – May 15, 1954) was an American military officer who brought success in World War II to the United States Army Air Forces by expanding the inventory of America's air arm to meet the needs of the coming war.
 More than any other man under Chief of the Army Air Forces, General Henry H. Arnold, Echols was responsible for the development, procurement and supply of aircraft and aeronautical equipment.
 Fighter projects officer Benjamin S. Kelsey, directly subordinate to Echols from 1934 to 1945, called him "The Man Who Won World War II."
George Rogers Clark (November 19, 1752 – February 13, 1818) was a surveyor, soldier, and militia officer from Virginia who became the highest ranking American military officer on the northwestern frontier during the American Revolutionary War.
 He served as leader of the militia in Kentucky (then part of Virginia) throughout much of the war.
 Clark is best known for his celebrated captures of Kaskaskia (1778) and Vincennes (1779) during the Illinois Campaign, which greatly weakened British influence in the Northwest Territory.
 Because the British ceded the entire Northwest Territory to the United States in the 1783 Treaty of Paris, Clark has often been hailed as the "Conqueror of the Old Northwest".
Lieutenant General Edward Soriano (born 12 November 1946) is an American retired military officer.
 He is the highest-ranking Filipino American officer to have served in the United States military, and the first promoted to a general officer.
 Born in the Philippines, Soriano moved with his family to the United States and graduated from Salinas High School before being commissioned as an officer through Army ROTC at San Jose State University.
Isaac Parsons (January 7, 1814 – April 24, 1862) was an American planter, politician, and military officer in the U.S. state of Virginia (now West Virginia).
 Parsons served as a justice of the peace of Hampshire County's District 3 from 1852 to 1853.
 He later served as a member of the Virginia House of Delegates representing Hampshire County from 1854 until 1857.
 Parsons was the grandson of Virginia House Delegate Isaac Parsons (1752–1796), the great-grandson of Colonial Virginia military officer William Foreman (died 1777), and the grandfather of First Lady of West Virginia, Edna Brady Cornwell (1868–1958).
The Man Who Knew Too Much is a 1956 American suspense thriller film noir directed by Alfred Hitchcock, starring James Stewart and Doris Day.
 The film is Hitchcock's remake of his own 1934 film of the same name.
Angus McDonald (December 30, 1769 – October 14, 1814) was an American military officer, landowner, and planter in the U.S. state of Virginia.
 McDonald served as a military officer during the War of 1812 following his appointment by United States President James Madison.
 McDonald was the son of Virginia military officer and frontiersman Colonel Angus McDonald and the father of Colonel Angus William McDonald, a commander in the Confederate States Army during the American Civil War.

Question: Which star of The Man Who Knew Too Much was an American actor and military officer?
Answer: James Maitland