First a bit of context, translated from
this article:
"The constitutional crisis caused by the resignation of president Jânio Quadros (in august 25 of 1961) frustrated a plan that, if executed, would surely gain a place in the anthology of political ravings: The president wanted to annex French Guyana into the brazilian territory, in a suprise military operation - a offensive like the frustrated argentine invasion of the Falklands in 1982
The argentinean invasion of the falklands resulted in a war between England and Argentina. What would be the international reaction for a brazilian expansion into French Guyana? Jânio Quadros even convocated the governor of Amapá, Moura Cavalcanti, to a secret audience in Brasília, a politician that years later, during the military regime, became the leader of the ministery of agriculture of general Garrastazu Medici and governor of Pernambuco after a indirect election..."
"..Besides giving the order to Moura Cavalcanti, the president showed a order to a military commander with the textual orientation:
*Study the possibility of annexing the French Guyana into Brazil - if possibility, by peacefull means"
Very well, first a map of the state of Amapá, where the invasion would begin:
The PoD is that Jânio Quadros doesn't resign and he continue with his plans to annex French Guyana, using a anti colonialist casus belli, could he succed by diplomatical means? And if he didn't, how would a invasion of Guyana play out in the field and in the international stage?