The Rosseau gang have been planning a foment for a long time, they simply were lying in wait until conditions were absolutely perfect for them: the market meltdown, SP dwindling, investor confidence shaken, etc etc.
That's why nothing's been said before: the armies were assembling, but until the first shot is fired, Noront had to prepare themselves to stockpile for war. The stockpile is drill results, the ramp at Windfall, and who knows what else behind the scenes. They will not have been idle.
I can tell you one thing: if the enemy is encroaching at your borders, you don't say "Oh, I"ll be there to take you on with my battalion of 50 men with all our weapons at high noon". That would be sheer folly! No, then the other guys would simply show up with 150 men and a tank, at 10 A.M. and kick down your door.
Surprise will be the greatest weapon,this is the fog of war, don't expect to be patted on the head by RN right at this moment. But I think when he breaks the silence, he will be worth listening to.
JMO