Brazil is not a stable country. They are a third world country,without a cohesive leadership their whole rotten structure will fall down. Brazil is not the USSR,it doesn't have a Siberian megalopolis that can produce tanks,all of its population is situated in the south and on the coastline. Once captured,cities as Fortaleza,Rio de janeiro, and Sao Paulo will destabilise the country ,and if the capital (Brasilia) is also captured ,the chaos that comes with moving the whole administration will literally destroy their country. Not only does the EU have more troops but Brasil still relies on old tier radios and old technology generally (even their tanks are 1975 tier). The only threat would be the population,but not even the government can control the mongrels (look at their crime rates).