Crossover by Valkyria Chronicles and HOI4
In an alternative reality, Brazil returned to being a monarchy and became a global superpower, having conquered all of South America and having the largest military force on the planet.
The Brazilian Integralist Empire just emerged victorious from the Second War, but one day the country and the entire south american continent were teleported to a different world, where an even bigger war is raging, they formed an alliance with a country called Principality of Gallia against a country called empire