SIP will work well for any sort of linear warfare. Even Napoleonic wargaming should work with these rules if we accept the abstract. But my thoughts today are for the English Civil War and Thirty Years War. To start, the basic building blocks are already in SIP. Regiments of troops are all close order infantry. Light infantry could be commanded shot, forlorn hope and the like. Heavy Cavalry and Dragoons are anything like Curasiers, Reiters, Dragoons (who don’t charge into combat but still shoot) and other sorts of Europeoan heavy horse similar to the Swedes. Light cavalry would be Hussars, Cossacks and such. Finally, artillery is artillery. It represents all forms of gunnery.
The first arm to consider is the infantry. This will be the trickiest to deal with. First off, they have a large portion of long pikes. I would prohibit cavalry charges to the front until the infantry have taken at least 1 DP. There is also unit sizes to deal with. If you are dealing with just the English Civil War, all infantry regiments are roughly the same size at somewhere around 500 men. Larger proportions of pike would get an advantage in melee vs enemies that do not measure up. But, these units would suffer in shooting. New Model Army regiments as well as swedes would have an advantage in shooting. But what of the larger Imperial and Spanish regiments? These regiments were about twice the size of a Dutch or Swedish regiment. However, they were also deployed about twice as deep meaning the frontage they took up was only a little wider. I’d allow them to take another DP for a total of five before being routed. I’d also allow them to shoot well simply because of the large amount of shot in the regiment. It would also not have any flank vulnerability. Finally, there is the large, 2000 man Spanish square. This was purportedly used at Lutzen. I would allow it to take 2 extra DPs for a total of 6 before it is eliminated. I would also allow it to shoot in two directions. It would also not have any flank or rear vulnerability.
Cavalry is pretty straight forward. Cavalry can either shoot or not shoot depending on the type. I suppose dragoons would be broken up into two classes. They would be mounted arquibusers and actual dragoons. arquibusers would fire from the saddle and may charge home. Dragoons fire similar to arquibusers but may not charge home. Instead, the get a bonus on shooting if they do not move that turn. Light cavalry also may not charge home but may shoot to harass the enemy.
The only modification for artillery is that once it fires, it is assumed to be set for the battle. In those times, artillery was moved by civilian teamsters. These teamsters did not want to fight so they would drag the guns into position and then get out of the way.
I’ll probably mock up a couple of cardboard armies and give these rules a go. I purchased a few figures from Permes from WGV. I’ve already experimented with reducing size in GIMP. The figures look pretty good. That was a while ago. So no pictures as of yet.