Hungary's modern borders were first established after World War I when, by the terms of the Treaty of Trianon in 1920, it lost more than 71% of what had formerly been the Kingdom of Hungary, 58.5% of its population, and 32% of the Hungarians.
As fronteiras modernas de Hungría estabelecéronse por primeira vez despois da Primeira Guerra Mundial cando, nos termos do Tratado de Trianon en 1920, perdeu máis do 71% do que fora antes o Reino de Hungría ademais do 58,5% da súa poboación e o 32% dos húngaros.