Not a rules set or technical guide, but I thoroughly recommend having a read of Hell Riders: the truth about the charge of the Light Brigade.
It’s a collection of survivor’s accounts of events, news articles, official reports and analysis thereof without getting bogged down to give a very complete and at least as convincingly accurate as you can get without a time machine overview, yet it isn’t all just the famed charge but also all the events that lead up to it and the fallout after it. There is some utterly astonishing stuff in there. Some of it will probably make you go ‘well how on Earth do I wargame that?’ because some of the events are just crazy. Otherwise provides useful insight into the campaign that could very well be of use for adding flavour to scenarios, great characters of the time too.