Rubuta ci gaba don wannan sakin layi - An haifi Jovanović a 1914 a Valjevo, Tsakiyar Serbia, dangin dangi na masu mallakar ƙasa da 'yan kasuwa. Ya kammala makarantar sakandare a can, ya shiga Kwalejin Falsafa a Jami'ar Belgrade. Duk da haka, kafin ya kammala karatunsa, Žikica, kamar sauran masu ra'ayin ra'ayin ra'ayi a fadin Turai, ya ba da gudummawa don taimakawa Jamhuriyar Mutanen Espanya ta ƙi juyin mulkin Fascist da aka kaddamar a lokacin rani na 1936. Duk da yake a Spain ya yi yaƙi tare da wasu bambanci a cikin yakin basasar Spain, kuma ya zama ƙwararren masanin yaƙin guerrilla mai daraja da kuma mayaƙan yaƙin Jami'ar Jami'ar Madrid.
tsakanin 'yan sa kai na Jamhuriyar Republican da kuma Sojojin Spain na Afirka. Ya ci gaba da yaƙi a kan jagorancin Balkan Volunteer Brigade a cikin wasu kamfen kamar Yaƙin Ebro da Teruel har zuwa faduwar Barcelona a 1939, tare da mummunan rushewar Jamhuriyar.