I'm Polish so I can help with that. Also I've got a condenser microphone so it would be in nice quality, not "skype definition". :)
Recording some ku*was and other sounds you need won't be a problem. :D
And Falaise Pocket, Market Garden. :)
As they used British equipment, uniforms and weapons, all we need is just a new shoulder sleeve insignia on the uniform and an eagle on the helmet.