here a TL that fits the Idea
i hope you like it
A nuclear War in beginn 1960s
(not important of Cuba Missle War or War about Berlin Wall)
Portugal, Spain, south France, Italy is over run by refugees of north Europe
Portugal dictator goverment decides to move refugees to colonies like Angola and Mozambique
while Brazil president Jânio Quadros offers to take so many refugees as possible
in same time allot of britsh refugees try to find a new home
in South Africa and Rhodesia (OTL today Republic of Zambia )
while Algeria is overrun by French refugees
Beginn of the Cargo Cult
so Brazil, Portugal colonies, South Africa and Rhodesia (and Other countries)
gets foreign technicians, scientists, teachers and other specialists
But there is a lack of everything else tools, factories, textbooks.
so some refugees return to devastated Europe to salvage wat was left over
and send it back to new home countries.
like complet disassembled factory to complett weapon system like B-52 Bomber and other NATO hardware.
South Africa and Rhodesia operate devastated England
Brazil operate in north France, Benelux and north Germany
wat bring them armed confrontation with new French government
the 6 republic under president Jean Marie LePen
but the Problems with Algerians resistance, need all attention
Brazil Military dictatorship 1964-1986
Do internal socioeconomic problem plus the refugees Problem
let to Military putch against president Jânio Quadros
first the People cheered but nothing change
while new leaders and officials enriched with richness of Europe
in 1968 the Dicaturship is ouster by a groop Germans refugees working in Barzil military
again the People cheered only to find them self in a nightmare
the new Dicatorship transtform Brazil, so called "German Efficiency"
many dissidents were executed, the remainder deported to north Europe Workcamps
a Ministry for State Security (portugese: M.S.E.) watch over the People
(the most effective and repressive intelligence and secret police agencies in the world.)
during 1968-1982 Brazil made a bloody change to high tech industrial country.
with priority on military weapons like Nuclear weapons and Bomber, Submarine and ICBM
against the U.S. (to avenge the Third World War)
but Brazil new Industry need commodities, to find in Africa
already Brazil help Portugal in resistance problems in they colonies in Africa
see Cap Verde uprise and mass murder of the population by Brazil militar in 1975
and crushing the Angolan Independence movment 1975-1980
because Angola offert access to new state to Kantanga (former Zaire province with Belgium refugees)
the South African Union
the Apartheid was taken with easy by Europe refugees, even exended to Rhodesia!
1970's Rhodesia were confronted by harsh demand by Portugal, Brazil and Katanga
to hand over parts of Rhodesia to Colonies of Angola and Mozambique !
so there is a direct connection to Angola and Mozambique (this is called the Pink Map in Portugal)
the Brazilan dicator was hungry for war (and to test new weapons systems)
only to discover that Rhodesia join South Africa Union (also extended to Namiba)
and that South Africa Union has Nuclear weapon (from NATO stockpile)
the conflicts is undecided and this is beginn of the Brazil-South Africa Union cold War