Looks like things are about to heat up
The Japanese seem to be on top of things, concluding that the Centauri are probably the target but taking no chances anyways. I wonder how the other nations will react to the attack; while Japan has no reason to like the Centauri they might like the idea of an aggressive Brazil neighboring them even less, or just want their own piece of the pie. Mars can't do much despite having something of an alliance with the Centauri, and the other nations following the assault force don't have much reason to care.
Brazil seems to have missed their best opportunity, when the Federation was weak due to military expansion, but probably still have a good advantage. The Centauri have 7 missile cruisers at last count, and seem unlikely to finish the two just laid down before the attack comes. Even assuming they can reload from planetary stocks, they'll probably have great difficulty penetrating the Brazilian Navy's beam based point defense; by my math, 70 24km/s missiles versus 150 gauss cannon shots with a tracking speed of 16 km/s, not to mention all the railgun fire. Unless they can stop them at the jump point or Brazil makes a major tactical blunder, I don't see it going well for them.