Romanian Advance into Transylvania(1918)
Background
The Armistice of November 11 and dissolution of Austria-Hungary created a vacuum in Transylvania. Romania re-entered the war to enforce Allied-approved occupation lines and respond to the Transylvanian Romanian National Assembly's declaration of union.
Campaign: Unification Campaign 1918-19
Forces Engaged

The Battle
Romanian forces advanced into Transylvania post-Armistice, entering Cluj on December 24.
{{Infobox Military Conflict | conflict = Battle for Transylvania | part of = Romanian Campaigns in World War I | image = 250px | description = Romanian soldiers in a mountain pass, 1916 | date = 27 August – 25 October 1916 | location = Transylvania, now in Romania | result = Victory of the Central Powers | casus = | territories = | combatant1 = | combatant2 = | combatant3 = | leader1 = 22px Ferdinand I of Romania 1st Army Ioan Culcer 2nd Army Alexandru Averescu 4th Army Constantin Prezan 9th Army Platon Lecițchi | leader2 = 22px|border 9th Army Erich von Falkenhayn 1st Army Arthur Arz von Straußenburg | leader3 = | force1 = 440,000 (initially) | force2 = 70,000 (initially)
Casualties & Outcome
~1,000 total (Romanian); ~2,000 total including captures (Hungarian)
Romania achieved victory over Hungary.
Romanian forces captured Cluj on December 24 and by January 1919 controlled all territory to the Mureș River, underpinning the Act of Union of December 1, 1918.
Significance & Legacy
Established military control before the Paris Peace Conference, shaping the Treaty of Trianon.
Frequently Asked Questions
- When was the Romanian Advance into Transylvania?
- The Romanian Advance into Transylvania took place in 1918. Nov 13–Dec 24, 1918.
- Who won the Romanian Advance into Transylvania?
- The Romania were victorious against the Hungary.
- What was the significance of the Romanian Advance into Transylvania?
- Established military control before the Paris Peace Conference, shaping the Treaty of Trianon.