Well, I’ve just stumbled onto the best resource EVER if you are writing about warfare in a time with mounted artillery. The King’s Troop is a ceremonial unit in the British Army which King George VI decided to maintain following the mechanization of the last of the horse drawn artilleries.
So what we have here is a troop of active soldiers who happen to train for warfare from horseback. This isn’t an amateur re-enactment group, these are actual soldiers.
This video is of their annual Musical Drive. Apparently, some of the formations they are doing have been in the drive since 1897.
There are loads more videos of them training and working. Very cool stuff.
Coolest thing on the Internet today.