Once in Australia, Rover established himself in Melbourne where he helped form the Melbourne Croatia football club in 1953 and obtained citizenship in 1956. He established the Australian branch of the Croatian National Resistance (HNO) in 1957 which was the more militant post-war wing of the Ustaše that was led from Spain by the notorious Ustaše concentration camp commander Vjekoslav "Maks" Luburić. Again the Australian authorities allowed the Ustaše to organise and openly promote their ideology, an Ustaša float was even permitted to participate in the 1962 Melbourne Moomba parade.
