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162 free Military trivia questions with answers — history quiz, new questions added Oct 2026.
50 free military trivia questions with answers. Think you know everything about military history and armed forces? Our Military Trivia Quiz will put your knowledge to the test! From legendary battles to iconic military leaders and historic campaigns, this quiz covers the most important moments in military history. Find out how much you really know about the world's militaries and their defining moments.
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Q 01Which unit of an Imperial Roman legion was typically double-strength and carried the eagle standard?
First Cohort
First Cohort troops were the legion's senior soldiers, and its eagle went into battle with them; losing one was the worst disgrace, and after three fell to German tribes in AD 9 Rome fought for years to win them back.
Q 02Which Persian king led the invasion delayed at Thermopylae in 480 BC?
Xerxes I
Xerxes I led the army in person; after two days of failed assaults a local man, Ephialtes, showed the Persians a mountain path around the pass, and the Greek rearguard under Leonidas was surrounded.
Q 03The earliest known crossbows were invented in which civilization?
China
China had crossbows by the 6th century BC, with trigger mechanisms cast in bronze; massed crossbowmen could see off a cavalry charge, and the weapon is credited with much of the Han dynasty's military success.
Q 04What was the code name for Nazi Germany's invasion of the Soviet Union during World War II?
Operation Barbarossa
Operation Barbarossa was named for Frederick Barbarossa, a crusading medieval German emperor; Hitler expected victory within weeks, but the advance stalled outside Moscow in December 1941.
Q 05Which US armed service comes under the Department of Homeland Security instead of the Pentagon in peacetime?
Coast Guard
The Coast Guard is one of the six armed services yet answers to Homeland Security, not the Pentagon; by law it operates as part of the Navy when Congress, in declaring war, or the president so directs.
Q 06Which fruit is the word 'grenade' thought to come from, given the shape of early bombs?
Pomegranate
Pomegranate is 'grenade' in French, from the Latin for 'having grains', and the word named the fruit long before the weapon; the bomb is thought to have taken the name in the 1500s, for its shape or its seed-like filling.
Q 07Which military discipline covers the movement, supply and maintenance of forces?
Logistics
Logistics can decide campaigns: in 1944 the Red Ball Express, a truck convoy system driven largely by African American soldiers, hauled thousands of tons of supplies a day to the Allied armies racing east from Normandy.
Q 08What was the German fortified belt across the northern Apennines in Italy during World War II called?
Gothic Line
Gothic Line defences were the last major German barrier before the Po Valley; Allied troops broke into them in autumn 1944, but the decisive breakthrough did not come until April 1945.
Q 09Which computer worm, uncovered in 2010, sabotaged the centrifuges of Iran's nuclear programme?
Stuxnet
Stuxnet, widely reported to be a joint US-Israeli weapon, made uranium centrifuges at Natanz tear themselves apart while feeding their operators normal readings.
Q 10Which gas did Germany release as a greenish cloud at Ypres in 1915, in the first large-scale lethal gas attack?
Chlorine Gas
Chlorine Gas was released from thousands of cylinders on 22 April 1915 and left to drift on the wind over French colonial troops, tearing a gap several kilometres wide in the Allied line.
Q 11Which Roman general defeated Hannibal at the Battle of Zama in 202 BC?
Scipio Africanus
Scipio Africanus defeated Hannibal at Zama in 202 BC, ending the Second Punic War; the victory earned him the honorific 'Africanus', though political attacks later drove him into retirement at Liternum.
Q 12Tanks first went into battle on 15 September 1916 during which First World War offensive?
The Somme
The Somme offensive saw tanks debut at Flers-Courcelette; of about four dozen Mark I machines many broke down before reaching the front, yet Haig was impressed enough to order hundreds more.
Q 13What is the primary role of a destroyer in a modern naval fleet?
Escorting and defending larger vessels
Q 21What is the highest military award for valor in the United States Armed Forces?
Medal of Honor
Medal of Honor rolls were purged in a 1917 review that struck off Civil War surgeon Mary Walker, the first woman to receive it; she went on wearing hers until her death in 1919, and it was restored in 1977.
Q 22Which battle is considered Napoleon Bonaparte's final defeat?
Battle of Waterloo
The Battle of Waterloo ended Napoleon's Hundred Days; Wellington's army held until the Prussians under Blücher arrived, and the name became a byword for decisive defeat.
Q 23Which of these military ranks is typically found in the non-commissioned officer (NCO) corps?
Sergeant
Escorting and defending larger vessels has been the destroyer's job since the 1890s, when 'torpedo-boat destroyers' were built to hunt the small torpedo craft that menaced larger warships; the name was later shortened.
Q 14Which tall cap, first worn by grenadiers to look more imposing, do Britain's Foot Guards wear on ceremonial duty?
Bearskin
Bearskin caps made grenadiers, already picked for their height, look taller and more frightening; Britain's Grenadier Guards took theirs from Napoleon's Imperial Guard after defeating it in 1815.
Q 15Which strategist is traditionally credited with the treatise 'The Art of War'?
Sun Tzu
Sun Tzu, a Chinese general of about 500 BC, is traditionally credited with its 13 chapters; Mao Zedong was among the later leaders who studied it, quoting its advice to 'know your enemy and know yourself'.
Q 16Which type of military aircraft is built mainly for air-to-air combat?
Fighter
Fighter aircraft were born in the First World War to shoot down the planes scouting enemy lines; a pilot who destroys five or more enemy aircraft is known as an ace.
Q 17Which chain of border fortresses, built in the 1930s, did German forces bypass in 1940 by attacking through Belgium?
Maginot Line
The Maginot Line guarded France's border with Germany but stopped short of the Belgian frontier; German tanks went around it in May 1940, and France fell in six weeks.
Q 18What is the term for a war in which rival powers back opposing sides instead of fighting each other directly?
Proxy war
Proxy war suited the Cold War superpowers: fearing that a direct clash would turn nuclear, the United States and the Soviet Union armed opposing sides in other countries' conflicts, such as Angola's civil war.
Q 19Which technology did Britain's WWII Chain Home coastal stations use to detect aircraft?
Radar
Chain Home was Britain's early-warning radar network; its coastal stations could spot enemy formations assembling over France, giving RAF commanders time to put fighters in a raid's path.
Q 20Which special operations force is known for its motto 'Who Dares Wins'?
British SAS
British SAS troops began in 1941 as a small desert unit raiding airfields behind enemy lines in North Africa; the regiment won worldwide fame in 1980 by storming the Iranian Embassy in London on live television.
Sergeant comes, through Old French, from the Latin for 'serving'; unlike captains, colonels and generals, who hold commissions, sergeants are enlisted soldiers promoted from the ranks to lead small units.
Q 24What term describes military members who hold civilian jobs while staying ready for call-up?
Reserve Forces
Reserve Forces let a country keep a smaller full-time army in peacetime yet expand quickly in war; US reservists typically drill one weekend a month and two weeks a year.
Q 25During World War II, the aircraft carrier replaced which type of vessel as the centrepiece of the world's major fleets?
Battleship
Battleship firepower counted for little against attack from the air: in April 1945 American carrier aircraft sank Japan's giant Yamato with bombs and torpedoes before she got near Okinawa.
Q 26Which collective defense alliance was formed in 1949 against the Soviet threat?
NATO
NATO's founding treaty treats an attack on one member as an attack on all; that pledge, Article 5, was first invoked not against the Soviet Union but after the 2001 terrorist attacks on the United States.
Q 27Which French-derived military term means scouting ahead to gather information about an enemy or the terrain?
Reconnaissance
Reconnaissance is French for 'recognition': scouts go ahead so that a commander can recognise what lies in front before committing the main force; soldiers shorten the word to 'recce'.
Q 28In which 1982 conflict did HMS Conqueror sink the cruiser General Belgrano?
Falklands War
Falklands War: HMS Conqueror's torpedoes sank a ship that had come through Pearl Harbor unharmed in 1941 as the American cruiser USS Phoenix, later sold to Argentina and renamed.
Q 29Which ancient Greek city-state was renowned for its disciplined, formidable military?
Sparta
Sparta's agoge took boys at seven and made hoplites of them; it was the dominant land power of Greece until Thebes beat it at Leuctra in 371 BC.
Q 30Which city gives its name to the 1949 conventions that protect prisoners of war, the wounded and civilians?
Geneva
Geneva was home to Henry Dunant, who was appalled by the untended wounded after the 1859 Battle of Solferino; his campaign led to the Red Cross and, in 1864, the first convention.