After World War I, the multi-ethnic Kingdom of Hungary was split apart by the Treaty of Trianon to form several new nation-states, but Hungarians claimed that the new state borders did not follow the real ethnic borders. The new Magyar nation-state of Hungary was approximately 1/3 the size of the former Kingdom, and millions of ethnic Magyars now lived outside the borders of Hungary. Many historically important areas of Hungary were assigned to other countries, and the distribution of natural resources came out unevenly as well. Thus, while the various non-Magyar populations of the old Kingdom generally saw the treaty as justice for the historically-marginalized nationalities, from the point of view of the Hungarians, the Treaty had been unjust and even a national humiliation.