With the help of Western authorities, who now viewed the fiercely anti-communist stance of the Ustaše favourably in the emerging Cold War, thousands of members of the regime were allowed to migrate to other countries, including Australia.

[8][page needed] Despite the post-war Menzies government having the knowledge that the Ustaše were responsible for carrying out genocide against Serbs, Jews and Romani, as well as murdering anti-fascist Croats, they were allowed to obtain citizenship and establish themselves during the 1950s and 60s to fund and organise various terrorist activities within Australia and abroad with the aim of destabilising the Socialist Federal Republic of Yugoslavia.

However, the continued strong infiltration of Ustaša ideology into the Croatian-Australian community assisted significantly to the creation of neo-Ustaše para-military units which were actively utilised in the Yugoslav region during Croatian War of Independence of the early 1990s.

Some of the Ustaše who made it to the Italian displaced persons camps or who were placed under the protection of the Vatican were assisted by Allied authorities in their ability to migrate out of Europe to countries where their vehement anti-Communist stance was deemed to be a potential asset in Cold War geo-politics.

[10] People with Croatian heritage had been migrating to Australia since the late 1800s, and when the Ustaše came to power as a Nazi puppet state in 1941, local Croatian-Australian leaders publicly condemned Ante Pavelić and his fascists.

Ironically, the Returned and Services League of Australia has for many years allowed representatives of the genocidal Serbian Nazi-collaborator militia, the Chetniks, to march in Anzac Day parades across the country.

[20] In 1961, the Croatian Revolutionary Brotherhood (HRB) was established in Australia by Geza Pašti, Jure Marić and Josip Senić with the later involvement of Father Rocque Romac (aka Stjepan Osvaldi-Toth) and Srećko Rover.

[16] The anti-communist zeal of the naturalised Ustaše immigrants aligned neatly with the political stance of both the ruling Liberal Party government under Robert Menzies, and ASIO under Charles Spry.

Deszol Saaghy, a former Hungarian member of the Nazi Brandenburger special forces unit and the French Foreign Legion, led the training at Tumbi Umbi.

[16][12][21][22] In July 1963, a group of nine Croatian-Australian men of the HRB were captured conducting covert operations in Yugoslavia with plans to assassinate local officials and raise a rebellion in the north of that country.

In May 1964, HRB member Tomislav Lesić attempted to deliver a suitcase bomb to the Yugoslav consulate in Sydney which prematurely exploded causing the loss of his lower legs and some of his sight.

[16] The Yugoslav government, however, took a more proactive approach to the Ustaše in Australia by utilising their security service, the UDBA, to assassinate leading HRB members Geza Pašti and Josip Senić while they were visiting Europe in 1965 and 1972 respectively.

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.

[16][29][30] 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.

[16] In April 1972, Srećko Rover was invited to attend a HNO world conference in Canada where he was expected to be appointed the global leader of the militant Croatian fundamentalist group, a position that had remained vacant since the assassination of Vjekoslav Luburić in 1969.

[35] 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.

[35] In June 1972, it was revealed by Yugoslavian authorities that a band of 19 armed men from the HRB, dubbed the Bugojno group or Operation Fenix, had been intercepted in Yugoslavia trying to conduct violent subversive activities.

Commonwealth police raids conducted later on houses in Melbourne and elsewhere revealed that Srećko Rover was the main organiser of the Bugojno group and had fanciful plans to install himself as a minister if the incursion led to a successful overthrow of government in Croatia.

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.

[16][45][46] 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.

This incident was later named the Murphy raids and caused a major political fracas that harmed the Whitlam government's reputation on their ability to withhold confidential Cold War information.

Other measures such as government threats to halt Yugoslav immigration and legislation being passed to criminalise fighting for foreign organisations, placed further pressure on limiting Ustaše activity.

[60] The pressure was continued under the Fraser government where 19 HRB members led by Jure Marić were arrested at an Ustaše paramilitary training camp at Mount Imlay in NSW in 1978.

These men, members of a new group called the Croatian Republican Party (HRS), were arrested and convicted of crimes including attempting to bomb Sydney's water supply, destroy Yugoslav travel agencies and murder Lovoković whom they viewed as a traitor to the Ustaše movement.

These units operated separate from the control of the regular Armed Forces of Croatia and were involved in pillage, rape and mass killings of civilians at places like the Dretelj prison camp in southern Bosnia.

[8][68] The HSP and HOS saw themselves as a continuation of the Ustaša regime and desired the recreation of a Greater Croatia based upon the borders of the Nazi puppet-state of the NDH which included all of Bosnia to the west of the Drina River.

[69][68] Members of HOS openly labelled themselves as Ustaše, their black uniforms and insignia emulated the Crna Legija and their marching anthem glorified the NDH, the Poglavnik and other Ustaša leaders such as Jure Francetić and Rafael Boban.

[74] Conversely, in Australia, Croatian social and sporting clubs continue to display busts and portraits of Ante Pavelić, Ustaše flags are flown proudly and support for HOS is also widely expressed.

[9][75] Zoran Milanović, the first prime minister of an independent Croatia ever to come to Australia, was shunned by much of the Australian Croatian community on a visit in 2014 due to his anti-fascist policies such as making the Za dom spremni chant illegal.

[83] The main logo for HNK Edensor Park football club is a map of Greater Croatia, which is a Croatian state advocated by the right-wing ultra-nationalist Dobroslav Paraga, the borders of which are extensions of those of the NDH.