Field of Glory Renaissance Cossacks

Another addition to my 28mm FoG-R armies, this time four bases of Cossack light horse. I was told they were Croats but I'm fairly convinced they are actually Cossacks! As the Imperial army can have either Cossacks or Croats it does not make much difference:

I was also told they were by 'The Assault Group' but couldn't find them in their list, they are certainly really nice figures though and in their style. Another view of the unit: