yes they do ..probably the first series (Risorgimento, Napoleonic ) are slender than WF but they are absolutly compatible...my Risorgimento and Early Napoleonic armies are based both on WF and Mirliton..My Atillery and wagons are mainly Mirliton and they stand perfectly with WF. i do not own any WF classical Imperial types Napoleonics from WF instead i have Early types (those labelled French Revolution)