So, like the subject line indicates, I'm facing a couple of these along my border with a country I foresee going to war with soon. My thought would be to see if they strike out on the offensive, let them come into my territory, flank them and cut off their supply so they will begin to bleed attrition. But, other than this, what would the community recommend in actually engaging such behemoth armies? It's 1861-62 and the two armies are estimated to be around 13000-15000 PWR while my biggest stacks are around 2500 if I don't want to avoid command penalties. I can see that the enemy has some penalties in their stacking, although not the full 35%.
Anyway, any tried and tested methods out there?