 Pedzisa mutsara unotevera: Zrinski akanga atozviratidza mumakore ekutanga makumi maviri munguva yekukombwa kweVienna muna 1529, uko kwakapiwa bhiza neketani yegoridhe. Mushure mekufa kwababa vake Nikola III muna 1534, Nikola IV nemukoma wake mukuru Ivan I vakagara nhaka muPounje, uye panguva imwechete vakatanga kuvasimbisa pamwe nekuita hukama nemaOttomans, avo vaibhadhara mutero wegore negore sababa vavo. Zvisinei, pakati pa1537 na1540 vakatanga kurwisana nemauto aGazi Husrev-beg kuti vatonge Fort Dubica. 