What was the primary result of the Treaty of Trianon?

The primary result of the Treaty of Trianon was the significant reduction of Hungary's territory after World War I. Signed on June 4, 1920, the treaty was one of the peace agreements that ended the war and specifically addressed the Austro-Hungarian Empire. Hungary, which had been a key part of this empire, lost about two-thirds of its land and over half of its population as a result of the treaty.

This loss included territories that became part of other countries like Romania, Czechoslovakia, and Yugoslavia, which considerably altered Hungary's political landscape and demographics. The impact of the treaty created lingering national tensions and feelings of grievance in Hungary, laying the groundwork for future political issues in the region.

While some of the other options touch on interconnected themes of European geopolitics after the war, they do not directly address the core outcome of the treaty itself, which fundamentally reshaped Hungary by drastically diminishing its size and influence.