You are quite correct, GB; most Napoleonics rules are focussed on 'set-piece' battles involving formed units of 'regular' troops, whereas the Cossacks forté was the pre- or post-battle screening, pursuit, and 'recon' function, at which they excelled. I've recently finished another reading of Alex & Yurri Zhmodikov's Tactics of the Russian Army in the Napoleonic Wars (Vols. I-II), published by George Nafziger in 2003, and their texts are full of many documented examples where, in various 'encounter', pursuit, and rear-area raiding actions, the Cossacks routinely made 'monkeys' out of formed enemy units, and routinely punched well above their weight in terms of casualties inflicted vs. received.