The study deals with the attempt of Slovak pro-Hungarian emigrants to influence possible solution of the Slovak question from abroad during the period of so called passive foreign politics of Hungary. The author focuses mostly on their activities in the sphere of secret military plans and propaganda aimed at the break-up of Czechoslovakia. The author points out to the fact that the studied sources of Hungarian origin highlight the significant position of Vojtech Tuka in these plans, or the constant efforts to utilise the conflict potential of the Slovak autonomy against the republic. The study analyses political strategies of pro-Hungarian elite and also points out to the importance of selected representatives of emigration in the Hungarian politics. The study results in analysis of the relationship of individual components of the “Slovak action”, both at home and abroad, however especially in the group around František Jehlička and the Hungarian governmental politics in the activities aimed at reviewing the status quo. In addition to analysing these attempts, the study also points out to the pragmatic realism of the Hungarian ruling elite, which at that time accentuated especially the improvement of the country’s position in terms of international politics and also kept various adventure events under control.