Nevertheless, Kvaternik believed that the Grenzers would play a significant role in the liberation of Croatia. He continued negotiations with the Italian and Hungarian emigration and offered the Croatian crown to the Prince Napoléon Joseph Charles, the Emperor's cousin and son-in-law of Italian King Victor Emmanuel II. After Napoléon refused the crown, he offered it to a Polish noble Władysław Czartoryski, who was a Catholic Slav. Kvaternik and his Italian and Hungarian allies made a plan to destroy Austria by instigating simultaneous revolts in both the Croatian Military Frontier and in Venice, while Giuseppe Garibaldi would land his troops in the northern Dalmatia. After that they counted on Hungarian and Romanian help with support of the Sardinian Kingdom and France. They also knew that Russia and Prussian Kingdom wouldn't offer any help to Austria. However, in 1865 the plan was withdrawn as Napoleon of France stopped to giving any help and thus forced Italy on inaction.