Vokić was born in Mostar on 23 August 1909. He attended a gymnasium in Sarajevo and studied Law at University of Zagreb. He ended his studies in 1929 and started working for the train service in Sarajevo. He co-founded the Croatian Academic Club Kranjčević and the newspaper Svijest and participated in the HKD Napredak.
Before the establishment of the Croatian state, Vokić was a member of the Ustaše branch in Zagreb. On 11 April 1941, by order of Slavko Kvaternik, he was sent to serve at the headquarters of the Ustaška Nadzorna Služba, whose main task was to lead and build up existing Ustaša combat formations and form new ones. Later that year he was appointed Director of Train Services in Sarajevo. He was an organising commander of all Ustaša traffic brigades. An associate of Jure Francetić, he was a founding member of Crna Legija. In 1943 he left Sarajevo and moved to Zagreb and on 11 October of that year he was appointed Minister of Traffic. At the suggestion of Mladen Lorković, he was promoted to the Ustaše rank of colonel and named minister of the Armed Forces on 29 January 1944, without the approval of German ambassador Siegfried Kasche and German military attache Edmund Glaise von Horstenau. On 13 July 1944Ante Pavelić promoted him to the highest rank, that of Krilnik. He became a close associate and friend of Mladen Lorković. Lorković introduced him to Baroness Vraniczany and Baroness Zlata Lubienski, members of high society, who became his good friends. At the beginning of August 1944, he stood as best man at the marriage of Lorković to Countess Nada Von Ghyczy.
Together with Mladen Lorković, Vokić led a coup dubbed the Lorković-Vokić plot. The coup's goal was for Croatia to switch sides in the war by declaring war on Nazi Germany and entering an alliance with Anglo-American allies. He visited the Domobran and Ustaše units and their officers and said they should expect a big event. He received support from the Domobran officers and lost favour with the Ustaše, who were loyal to Ante Pavelić. He contacted Ivan Faroli, lawyer for Vladko Maček, the president of the Croatian Peasant Party. He informed Faroli about a coup to bring down the Ustaše and give power to the Croatian Peasant Party. This included the replacement of Ustaše's officers with Domobran officers, loyal to the Croatian Peasant Party and disarmament of German units on Croatian territory. Later Pavelić was visited by a Gestapo officer and told about Germany's new weapons which would turn the war in its favour. On 21 August 1944, Pavelić informed Siegfried Kasche about the coup and announced actions against the putschists. He also accused German general Edmund Glaise von Horstenau of involvement in the coup, because von Horstenau was coaxing Pavelić to approve the coup. Vokić's friend, Ante Štitić, a high ranking police official who was also involved in the coup, wrote a report after meetings with Lorković and Vokić. He handed the report to the Ustaše units commander, Ivo Herenčić, an old opponent of Vokić. Herenčić gave the report to Pavelić. That report was the main evidence presented against Vokić and Lorković at their trial for "high treason".
Death
At a sudden government assembly on 30 August 1944, Vokić and Lorković were accused of conspiring against Pavelić and his Croatian allies, mainly Nazi Germany. They were removed the same day from their duties and placed under house arrest. Lorković and Vokić were brought in front of Poglavnik's Bodyguard Unit court. They convicted him, stripped him of his rank and expelled him from the unit. He was later interned in Novi Marof; from there he was moved to Koprivnica with Lorković. He was then jailed in Lepoglava prison and on 8 May 1945, the dayGermany surrendered, Vokić was executed.
