The University of Edmonton-based Encyclopedia of Ukraine, initiated by Volodymyr Kubijovych -- the Ukrainian who led WWII-era collaboration with the Nazis -- states that the AntiBolshevik Bloc of Nations (ABN):

This November 1943 meeting organized by Stepan Bandera’s faction of the Organization of Ukrainian Nationalists (OUN-B), was instigated by the Nazis to create an "Anti-Bolshevik Front." Its 39 delegates from twelve "enslaved" Soviet ethnic groups formed a network of "underground" armies. Calling themselves the Committee of Subjugated Nations (CSN), this alliance of fascist armies "was the direct precursor" of the ABN, "though nationalists continue to deny its Nazi origins."2

The Red Army defeated the Nazis in huge, 1943 battles in Kursk and Stalingrad. Nazi military intelligence (Abwehr) and the Reich Ministry for the Occupied Eastern Territories (led by fascist ideologue Alfred Rosenberg) turned to their strongest eastern allies: the OUN-B and its Ukrainian Insurgent Army (UPA). In 1943, they were joined

Besides the UPA, the CSN included Romania’s Iron Guard, Hungary’s Arrow Cross, Slovakia’s Hlinka Guard and other fascist legions from the Baltics, Bulgaria and Belorussia.4 Sharing the Nazi’s rabid hatred of Russians, Jews and communists, the CSN sought to obliterate the USSR by dividing it into ethnically-cleansed, Christian states.

After WWII, the CSN had to replace its Nazi sponsors. In 1946, with funding from the US, UK and West German governments,5 the CSN became the ABN. Its "most active group" remained the OUN(B).6 In 1951, US army intelligence said the OUN(B) was "composed of rough, tough younger men of strong convictions without the slightest aversion to violent murder or otherwise ruthlessly disposing of any and all opposition."7

ABN leaders Yaroslav Stetsko and Ferdinand Durcanský often met with Latin American fascists such as Brazillian admiral Penna Botto (who supported Nazi Germany during WWII and supported the US/Canada-backed military coup in Brazil in 1964). Photo from AntiBolshevik Bloc of Nations (ABN) magazine, ABN Correspondence, Jan/Feb 1987, p.17 (from "Tribute to Yaroslav Stetsko" at the 1986 ABN Conference in Toronto by then-Chairman of ABN-Canada, Orest Steciw).

ABN leadership was a who’s who of fascists. Its president from 1946 until his death in 1986, was Bandera’s deputy, Yaroslav Stetsko. During a 1981 visit to the US to celebrate the 40th anniversary of the OUN-B’s declaration of an "independent" proNazi Ukraine, Stetsko summed up the ABN’s goal and its violent strategy:

Other ABN leaders included fascist Hungarian general Ferenc Farkas, Croatian general Hinko Alabanda (whose Ustaša death camps killed hundreds of thousands of Serbs, Jews and Roma), and Ferdinand Durcanský, the former foreign minister of clerico-fascist Slovakia, who found safe haven in Canada (1950-51) before working for the ABN in Britain and Germany, and becoming a CIA advisor.

The ABN logo used an ancient German wolfsangel: This iron hook to kill wolves was an early Nazi emblem used by Waffen SS divisions. Like the swastika, its use is now banned in Germany It was also used in the logo of the Nazi's Stormtroopers: the National Socialist Movement in the Netherlands (1931-1945): a far-right Italian terrorist movement (1978-82): the white-power Aryan Nations and Christian Identity groups: Ukraine’s neoNazi Party (now called Svoboda): and Ukraine's Azov Battalion, a fascist-linked militia that aided the pro-NATO Maidan coup in 2014.  Azov is now incorporated into Ukraine’s National Guard.

As a Cold War asset of the CIA, the ABN was central to its propaganda vehicles, such as Radio Liberation from Bolshevism (now called Radio Liberty).  As Jonathan Levy notes:

Throughout the Cold War, the ABN held some of its largest events in Toronto. (See also here and here.) Its 1986 congress there received "warm greetings" from Pres. Reagan and PM Mulroney. Toronto was fertile ground for the ABN because many of the far-right immigrants selected by Canada, settled in Toronto after the war. There they formed groups representing the antiSoviet diaspora from Europe’s "captive nations."

In 1996, after achieving the Nazi-cum-CIA dream of destroying their common Soviet enemy, the ABN ceased operations.

World AntiCommunist League (WACL)

Through the 1950s and 1960s, Stetsko attended meetings of the Asian People’s AntiCommunist League. Created in 1954 by US-backed regimes in South Korea, South Vietnam, Taiwan and the Philippines, it joined with Stetsko’s ABN and other fascist entities from six continents to form the World AntiCommunist League (WACL) in 1966.

The WACL united Nazi politicians, Japanese war criminals, Italian terrorists, Salvadoran and Guatemalan death-squad leaders, US-allied dictators (Argentina’s Jorge Videla, South Korea’s Park Chunghee and Paraguay’s Alfredo Stroessner), former CIA officials, Moonie cult leaders, Saudi sheikhs, Nicaraguan contras, Afghan mujahideen and retired US Gen. John K. Singlaub.10

WACL events were graced by Senators, Congressmen, MPs and archbishops. Its 1984 confab had greetings from US President Ronald Reagan. No mere think tank, it was "an instrument for the practice of unconventional warfare—assassinations, death squads, sabotage—throughout the world."11 After the USSR’s destruction, it became the World League for Freedom and Democracy.