The horse and rider are from Perry's mounted men at arms, the only major change was to use a horse head from their ACW cavalry box, to provide a bit more movement as it's reins are grabbed by the assailant. The Swiss soldier is a plastic body from WotR box with arms selected from the Agincourt French Infantry sprue and a Swiss metal head. The joins have been covered with green stuff, to represent a coat, rather than the livery vest that's designed on the plastic body (which the Swiss don't appear to have worn), although I've not added a breastplate which the image seems to show. Like the illustration, a discarded lance and halbard will lie on the ground.
Now on to the painting stage.