From 1969 to 1973, the operations of the Ustaše increased dramatically both in their number and in their violence. This coincided with the advent of the
Croatian Spring, a widespread movement within Yugoslavia for Croatian autonomy. A total of around 60 attacks were attributed to the Ustaše movement in Australia during this time period and, as in the past, the authorities were still unable or unwilling to halt them. An additional reason for this upsurge was the 1969 assassination in Spain of the HRB's genocidal figurehead,
Maks Luburić. More than 60 Luburić supporters demonstrated at the Yugoslav embassy in Canberra following his killing. Bombing targets were expanded to include the Yugoslav and
USSR embassies in
Canberra, Yugoslav travel agencies, cinemas displaying Yugoslav films, and also various Serbian orthodox churches. The bombing of the Yugoslav consulate in Melbourne in October 1970 did considerable damage to both the building and around 20 homes near to it. Racketeering and extortion were also applied by the Ustaše to both fund and create fear of their movement. In an apparent political execution, known anti-Ustaša Croatian Yago Despot and his friend Charles Hughes, were found dead in their Caulfield residence each with a single bullet wound to the head. This double-murder remains unsolved. Additionally at this time, new branches of the Ustaše were established in Australia, including the United Croats of West Germany (UHNj) and the Croatian Illegal Revolutionary Organisation (HIRO), with Jakov Suljak being the Australian head of the former group. Two militant youth organisations were also created: the Croatian Youth (HM) run in Australia by Ante Kovac and Jure Marić, and the World League of Croatian Youth (SHUMS) with Zdenko Marinčić being the local secretary. Two prominent Catholic priests from the Ustaše regime, Josip Kasić and Josip Bujanović also became leaders of the movement in Australia around this period. Kasić, who was part of Pavelić's student bodyguard during WW2, had been imprisoned in Yugoslavia for Ustaša activities. After coming to Australia, he spread pro-Ustaša propaganda from the pulpit of the St Nikola Tavelić Church in
Clifton Hill. In 1972, there were several major Ustaše activities which resulted in the Australian authorities finally taking a stand against the terrorist attacks. A week before his departure overseas, a coordinated series of bombs were detonated across three sites in Melbourne targeting Yugoslav exhibitions and the apartment of Marjan Jurjević, who was a high profile anti-Ustaša Croatian-Australian. No-one was killed, but Rover was considered a person of interest in the organisation of the bombing with the Commonwealth police strongly advising the federal government to prevent Rover from travelling abroad. The
McMahon government declined to do this but did cancel Rover's passport while he was in Canada. This caused substantial interference with the HNO world conference and Rover was deported back to Australia. The situation caused significant mainstream media attention on Rover, the Ustaša and their roles in terrorism. Two other Croatian-Australian members of the HRB had been recruited for the Bugojno incursion but police action prevented their participation.
Blaž Kraljević, who later became the commander of the
HOS forces in the
Croatian War of Independence, was arrested in
Melbourne for liquor offences, while Zdenko Marinčic had been stopped at
Frankfurt Airport with a firearm and four silencers hidden inside a toy
koala. Marinčic, whose father was an Ustaša soldier that survived the
Bleiburg repatriations, was sent back to Australia where he was jailed for six months. He avoided deportation to Yugoslavia and later became a prominent member of Croatian-Australian society.
George Street Bombings On 16 September 1972, two Yugoslav travel agencies were bombed during the busy morning period in
George Street in central Sydney. Two coordinated blasts injured 16 people, 3 seriously, most of whom were bystanders in the busy street outside the agencies. Tomislav Lesić, who was involved in previous operations, was found at the bomb site with his artificial legs damaged by the blasts. This bombing shocked the nation in the way that it was planned to inflict casualties on the general public. The NSW police established a special bomb squad after this incident and were certain that the Ustaše groups were responsible. The federal Liberal government, however, refused to acknowledge even the existence of such extremists. Ustaša activist, Ljubomir Vuina, was charged and remanded on bail with threatening to destroy other Yugoslav travel agencies.
Killing of an American tourist in a car bomb In December 1972, an American tourist, Thomas Patrick Enwright, was killed in a car bomb that was detonated outside a Serbian Orthodox church in Brisbane. An annual meeting was being conducted at the Serbian church at the time and it is believed Enwright was an accidental victim of the bomb intended to harm the members of the church. Interestingly, Enwright was the relative of a policeman and US police were at that time helping Queensland authorities in related investigations. Despite the magnitude of these and other attacks within only a number of months of each other, the
Liberal Party government still continued to obfuscate making public the organisers of these terrorist activities, with Attorney-General
Ivor Greenwood in particular, denying even the existence of the Ustaše. Begović died in 2008 but remains an honoured life member of
Football Victoria. The Ustaša led violence within Australia during this time was also occurring within the context of significant terrorist activities being performed by related groups overseas. This included the
1971 Yugoslav Embassy shooting, the 1972 bombing of the Yugoslav airliner
JAT Flight 367, and the hijacking of
Scandinavian Airlines System Flight 130 in September 1972. Strong support for these acts of terrorism was evident within the Croatian-Australian community and during this crisis Australia was seen as a possible haven for the terrorists involved. ==Crackdown on Ustaše under the Whitlam and Fraser governments==