I don't usually do historic gaming, and up to now if I did, I thought it would most likely be for the first world war, but I've got to say that this game looks like it would be a lot of fun - reminds me of a lot of the WWII action and suspense movies I grew up with (Where Eagles Dare, Guns of Navarone, etc.)
Better still, those rules look like they could work with other eras and genres, too, for skirmish raids in WWI or earlier, and even for modern or future skirmish raids (this sort of thing wouldn't be far out of place in a Star Wars style sci-fi setting, for example!)
Should work great for pulp-style subjects as well - anything from raiding some supervillain's death ray or secret base (this looks like a job for Doc Savage!), to a Mission: Impossible, James bond, or Man From U.N.C.L..E. style super-spy thing would fit the rules in those screenshots nicely!
I think I might try this one out!