Duhhhh! Was that supposed to be some sort of secret? That's what armies do. EVERYBODY's armies,including ours.
I can guarantee you that somewhere in the vaults of the Pentegram there is a locked drawer with plans for the US invasion of Finland.
Not only that,but there are people updating it occasionally.
These are CONTINGENCY PLANS,not active plans. After all,why would China want to threaten the largest source of their income?