Vampiric Corruption is a useful tool on the campaign map, as it increases public order and causes attrition among enemies, but it takes many turns to establish, by default.
Taking territory a bit at a time, and solidifying it behind you, is arguably the best strategy you can use. Vampires are ageless and immortal, and they can afford to play the long game. Thankfully, both race-nations have other things to deal with than Western and Eastern Sylvania, your starting position.
The Vampire Counts (VCs) begin in a bad position they are stuck between two of the largest race-nations on the Old World map: the Empire (humans) and the Dwarfs (dwarfs).
