The Cossack wagan tabor should look like this, notice the light wagons. The Polish Film 'With Fire and Sword' shows some of the wagons with a small swivel gun on one of the corners. I will buy some from Eureka Miniatures who make them for their Pirate range and use the rules for the Scots frame gun in the WECW rules. The article on the Cossack Rebellion where this picture comes from can be found here http://www.militaryhistoryonline.com/horsemusket/korsun/default.aspx