In 1906 he proposed the federalization of the Austro-Hungarian monarchy into the so-called United States of Greater Austria.
In 1906 the ethnic Romanian Austro-Hungarian lawyer and politician Aurel Popovici unsuccessfully proposed the reorganization of Austria-Hungary as the United States of Greater Austria.
After serving as an advisor for Archduke Franz Ferdinand, counseling on the latter's projects to redefine the Habsburg states along the lines of a United States of Greater Austria, Maniu moved towards the option of a union with the Romanian Old Kingdom when the Archduke was assassinated in Sarajevo in 1914.
However, activism for union per se was largely held off until after World War I and the Treaty of Trianon, with Romania itself oscillating between alliances with the Central Powers and the Entente, and with the parallel offer made by Archduke Franz Ferdinand of Austria (the heir apparent) to negotiate for a compromise (see United States of Greater Austria).
United States | United Kingdom | Austria | Republican Party (United States) | Democratic Party (United States) | United States House of Representatives | President of the United States | United Nations | United States Senate | United States Navy | United States Army | Supreme Court of the United States | United States Air Force | Native Americans in the United States | United States Congress | Parliament of the United Kingdom | 66th United States Congress | Prime Minister of the United Kingdom | 74th United States Congress | 18th United States Congress | 73rd United States Congress | 54th United States Congress | 61st United States Congress | United States Marine Corps | United States Department of Defense | 64th United States Congress | 65th United States Congress | 53rd United States Congress | 52nd United States Congress | 55th United States Congress |