High medieval militaries seem, to my admittedly amateur eyes, to all be fairly similar in broad strokes. They seem to be dominated by big dudes in lots of armor riding around on large horses (please correct me if this is inaccurate), and those men seem to typically be semi-professional soldiers of the upper classes. Was this true of militaries in slavic countries? Or were Ukranian, Russian, and similar militaries more similar to those of Steppe, Byzantine, or Turkish militaries?