My friend and I have been renovating our very old plastic ACW armies for some fights (and also as they needed it). I always feel happy to see some figures I have had for 30 years get to the table for some “old school” entertainment.
No, they are the newer Italeri figures that have Chasseurs in them. My friend had converted Airfix Legion into Chasseurs and I think that unit is at least 40 years old.
I never had airfix as a kid but I met a local guy a few years ago who was going to re-fight Gettysburg at 1:25 scale who eventually decided on a better scale. So 1000 Union figures headed in my direction.