Hearts of Iron IV
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50 free Hearts of Iron IV trivia questions with answers — trivia quiz, new questions added Oct 2026.
Hearts of Iron IV lets you take charge of any country on the map in the years around the Second World War, from the great powers down to states with a handful of divisions. Each one plays differently, and many can leave history behind: monarchs return, old realms are reborn, and small countries end up running the planet. This quiz covers the nations of HOI4 the way players talk about them: who counts as a major, which side leads which faction, what each focus tree lets a country do, which expansion or country pack added whose content, and the formable nations and achievements that reward the wildest runs. A few questions step outside the map to the game's systems, its release and its best-known mods. It is written for anyone who has lost an evening to one more focus, from newcomers who stick to the famous powers to veterans who start as a one-province minor. Every answer comes with a short explanation, so a wrong guess still teaches you something about the game.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Hearts of Iron IV launched on 6 June 2016, the 72nd anniversary of which Second World War event?
Normandy landings
The Normandy landings began on 6 June 1944, and the game arrived exactly 72 years later after slipping from its planned 2015 release.
Q 02Which Hearts of Iron IV mod imagines a world where the Central Powers won the First World War?
Kaiserreich
Kaiserreich is widely considered the largest and most in-depth mod for the game, and it reached the Steam Workshop within six months of launch.
Q 03Which Swedish metal band has teamed up with Hearts of Iron IV for several downloadable music packs?
Sabaton
Sabaton's collaborations sit among the cosmetic and music packs sold as add-ons, separate from the expansions that bring focus trees.
Q 04Which ideology completes the set of four in Hearts of Iron IV, alongside democratic, communist and fascist?
Non-aligned
Non-aligned is the catch-all ideology, covering monarchies, dictatorships and even the anarchists who can win the Spanish Civil War.
Q 05Which nation, the historic Graveyard of Empires, lends that nickname to a Hearts of Iron IV country pack?
Afghanistan
Afghanistan anchors the Graveyard of Empires pack, and its focus tree offers a choice between historical isolation and rapid industrialisation.
Q 06Which Hearts of Iron IV mod is based on the animated series My Little Pony: Friendship Is Magic?
Equestria at War
Equestria at War placed seventh in the player vote for ModDB's 2023 Mod of the Year award, six years after its debut on the Steam Workshop.
Q 07Which nation is Italy already fighting when Hearts of Iron IV opens in 1936, the only war under way?
Ethiopia
Ethiopia is the only country at war as the 1936 start opens, and Italy's edge in numbers and technology usually settles the fight within months.
Q 08Which monarch can Britain make an absolute ruler in Hearts of Iron IV's Monarchist path, allied with Germany?
Edward VIII
Edward VIII can rule as an absolute monarch on that path, which even lets Britain press a war goal to install a monarchy in the United States.
Q 09Which defeated breakaway state can the United States revive in Hearts of Iron IV, provoking a new civil war?
The Confederacy
The Confederacy can rise again since the Man the Guns expansion, and one achievement asks a United States player to beat the Confederate States a second time.
Q 10Which exiled revolutionary can lead Mexico in a Hearts of Iron IV achievement about puppeting the Soviet Union?
Leon Trotsky
Leon Trotsky takes charge of Mexico in The New Home of the Revolution, an achievement that then demands making the Soviet Union a Mexican subject.
Q 11Which Hearts of Iron IV gauge, running from 0 to 100, measures how close the globe is to all-out conflict?
World tension
World tension rises with aggressive acts, and a nation may need a certain level of it before justifying a war or sending volunteers abroad.
Q 12Which abstract resource do Hearts of Iron IV nations spend to change laws and appoint ministers?
Political power
Political power pays for mobilization, conscription and trade laws as well as new ministers, and every focus in progress drains a little of it.
Q 13Which faction does the Soviet Union lead at the start of Hearts of Iron IV, opposite the Allies and the Axis?
Comintern
Q 21Which leader rules Turkey when Hearts of Iron IV opens in 1936, before players keep or halt his reforms?
Kemal Atatürk
Kemal Atatürk heads the government in 1936, and a later country pack lets Turkey continue his reforms, restore the Sultan or found an Islamic state.
Q 22Which Nordic nation's focus tree in Hearts of Iron IV relives its stand against a far stronger Soviet invader?
Finland
Finland got the tree in Arms Against Tyranny, the expansion that also added military industrial organizations and an international arms market.
Q 23Which Hearts of Iron IV country pack added focus trees for Bulgaria, Greece and Turkey?
Battle for the Bosporus
Comintern is one of three factions already in place in 1936, alongside the Allies under the United Kingdom and the Axis under the German Reich.
Q 14Which nation is one of the seven major countries when Hearts of Iron IV begins in 1936?
Japan
Japan ranks as a major alongside Germany, Italy, France, the Soviet Union, the United Kingdom and the United States; a faction fights on until all its majors capitulate.
Q 15Which exiled former emperor can Germany put back on the throne in Hearts of Iron IV after ousting Hitler?
Wilhelm II
Wilhelm II returns through the Return of the Kaiser focuses, which re-create the German Empire that fell in 1918 and open war goals against Britain and France.
Q 16Which monarch must lead France while it occupies Moscow for a Hearts of Iron IV achievement?
Napoleon VI
Napoleon VI must be the country's leader for the achievement Second Time's the Charm, a wink at the first Napoleon's ruinous 1812 march on Moscow.
Q 17Which fallen medieval realm can Greece re-form in Hearts of Iron IV, renaming Istanbul back to Constantinople?
Byzantine Empire
Byzantine Empire becomes the country's name once the decision is taken, its map colour turns purple and the capital moves to the renamed city.
Q 18Which ancient realm, a great ambition of Fascist Italy, can Italy re-form in Hearts of Iron IV by conquest?
Roman Empire
Roman Empire is open to Italy under any ideology once it has conquered the required territories, though forming it usually rules out Greater Italy.
Q 19Which leader must head Communist China when it wins the Chinese Civil War for a Hearts of Iron IV achievement?
Mao Zedong
Mao Zedong has to be the current country leader for the achievement to fire, and the game also checks which territory his side owns.
Q 20Which company published Hearts of Iron IV, having earlier released Crusader Kings II and Europa Universalis IV?
Paradox Interactive
Paradox Interactive saw the game sell more than 200,000 copies within two weeks, the fastest start for one of its historically themed titles up to then.
Battle for the Bosporus gives the three Black Sea and Aegean neighbours rival paths, from a Turkish-led Balkan faction to a restored Sultan.
Q 24Which Hearts of Iron IV expansion gave focus trees to Canada, Australia, South Africa and the British Raj?
Together for Victory
Together for Victory also introduced the autonomy system that grades subject states by their independence, and it is now part of the base game.
Q 25Which neutral nation gained a Hearts of Iron IV focus tree in By Blood Alone, alongside a reworked Italy?
Switzerland
Switzerland sits surrounded by France, Germany and Italy, and its tree is about balancing rival factions and overtures from the great powers.
Q 26Which nation's focus tree arrived in United and Ready, a free pack released the same day as Hearts of Iron IV?
Poland
Poland received the tree on launch day, along with voice acting for its military units and art for its ministers, generals and leaders.
Q 27Which peninsula, scene of a famous ANZAC campaign, must Australia occupy for a Hearts of Iron IV achievement?
Gallipoli
Gallipoli is the goal of the achievement Once More Mate, which the game counts as done when Australia controls the Turkish province of Edirne.
Q 28Which Hearts of Iron IV achievement, named after a shelved invasion plan, has Germany control mainland Britain?
Operation Sea Lion
Operation Sea Lion was the 1940 scheme to cross the Channel that never sailed; the achievement checks regions such as South-West England.
Q 29Which defunct trading firm can the British Raj revive as a corporate nation in Hearts of Iron IV?
East India Company
East India Company rule is one of several alternate paths in the tree, beside freeing the Princely States or forming Pakistan and Bangladesh.
Q 30Which demilitarised region can Germany reoccupy with one of its first focuses in Hearts of Iron IV?
Rhineland
Rhineland is the focus that marches troops back into the zone, and it cannot be combined with the rival opening focus Oppose Hitler.