But after the police investigation into the assassination of Archduke Franz Ferdinand revealed the involvement of Serbian Army military intelligence chief Colonel Dragutin Dimitrijević, Gyóni, like many other Austro-Hungarians, accepted the Imperial Government's allegations of, "a plot against us," and the necessity of fighting, "a defensive war." Some Hungarian intellectuals felt that World War I provided an excellent opportunity to pay back the House of Romanov for Tsar Nicholas I's pivotal role in the defeat of the Hungarian Revolution of 1848.