The Treaty of Trianon

Hungarian Political History I: Empire, Trianon & the Road to 1956

Chapter 4 · The Treaty of Trianon (1920): Hungary's Real, Lasting Political Wound

Chapter 3 closed with Horthy's new regime already resting on one real, completed founding story — having ended the Hungarian Soviet Republic. Within months of that regency beginning, a second grievance arrived, one that would shape Hungarian politics far longer and far more broadly than the first.

The Real Terms

Hungary signed the Treaty of Trianon on 4 June 1920, at the Grand Trianon palace at Versailles — ratified 16 November 1920, formally taking effect 26 July 1921. Its real, numerical scale was extraordinary: Hungary lost approximately 72% of its pre-war territory and 64% of its population. The pre-war Kingdom of Hungary's 325,411 km² became a landlocked rump state of just 93,073 km², home to roughly 7.6 million people.

Where the Territory Went

Recipient	Real territory gained
Romania	Transylvania and other eastern territories — the largest single share
Czechoslovakia	Slovakia and other northern regions
Kingdom of Serbs, Croats and Slovenes (Yugoslavia)	Croatia and southern areas
Austria	Real border adjustments

3.3 Million Hungarians Outside Hungary

The treaty's single most politically enduring real consequence was demographic, not territorial: approximately 3.3 million ethnic Hungarians found themselves living as minorities in the neighboring states that had just received their own homeland's former territory — a number large enough that a genuinely significant share of Hungarian families now had relatives living across a border they had not personally crossed.

Apponyi's Real, Fruitless Appeal

Before the treaty was finalized, Hungary's delegation had made a real, documented attempt to change its outcome. On 16 January 1920, at the Quai d'Orsay, Count Albert Apponyi delivered a real, striking address in three languages — speaking in French, translating himself simultaneously into English, and concluding in Italian. He explicitly invoked President Wilson's own principle of national self-determination, arguing that no group of people should be transferred between states without being consulted first, and offered that Hungary would accept the outcome of genuine plebiscites in the disputed territories.

Widely acclaimed, entirely without effect Apponyi's own performance was real and genuinely admired at the time — but the Allies refused to amend the treaty's terms, or even to discuss them further. It enhanced his own domestic reputation while changing nothing about the treaty Hungary would go on to sign five months later: a real, documented case of moral argument carrying no actual political leverage against powers who had already decided the outcome.

Signed Under Protest

Hungary's own delegation signed the treaty under protest. Agitation for its revision began immediately, and Hungarian revisionism and irredentism — the real, sustained political movement to recover lost territory — became an enduring feature of interwar Hungarian politics, not a passing reaction. Real evidence of just how central this became to state policy: as late as 1934, Prime Minister Gyula Gömbös personally presented Mussolini with the specific territories Hungary wished to peacefully reannex — revisionism as an actual, ongoing item of foreign policy, not merely rhetoric.

Finding: a second, far broader unifying cause Chapter 3 closed by noting Horthy's regime had one real, completed founding story — defeating the Hungarian Soviet Republic — narrow enough that it mattered most to those who had actually feared or opposed Bolshevik rule directly. Trianon gave the same regime something broader and more durable still: a grievance touching a real, documented 3.3 million ethnic Hungarians and their families directly, and millions more indirectly, giving interwar Hungarian politics a shared organizing cause that would outlast any single government and shape policy for the entire span of Horthy's own regency — the subject of this course's next chapter.

Hands-On Exercises

Exercise 1

Explain why Apponyi's real, trilingual appeal to the principle of self-determination failed to change the treaty's terms, despite being genuinely well received at the time.

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Exercise 2

Explain why the real figure of 3.3 million ethnic Hungarians living outside Hungary's new borders had a genuinely different, broader political effect than the territorial loss figures alone.

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Exercise 3

Using Gömbös's real 1934 meeting with Mussolini, explain why Hungarian revisionism should be understood as genuine, ongoing state policy rather than only public sentiment or rhetoric.

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Quick Reference

4 June 1920: the Treaty of Trianon signed at the Grand Trianon, Versailles
Real losses: ~72% of territory, ~64% of population; 325,411 km² down to a landlocked 93,073 km²/7.6 million people
Territory went to: Romania (Transylvania, largest share), Czechoslovakia (Slovakia), Yugoslavia (Croatia), Austria (border adjustments)
~3.3 million ethnic Hungarians left as minorities in the neighboring states
16 January 1920: Apponyi's real trilingual appeal at the Quai d'Orsay — widely acclaimed, entirely without effect on the treaty's terms
1934: Gömbös presents Mussolini with Hungary's own desired reannexation territories — revisionism as real, ongoing foreign policy