the point is Russia keeps claiming they are not involved in the Ukraine conflict and that there's no troops there. Yet, there's evidence always being revealed that this claim is a lie
No, there is evidence that American and Polish mercenaries are involved like on this footage from Mariupol:



or on this one:

http://www.youtube.com/watch?v=ljWXC...yer_detailpage

or on this one:

http://www.youtube.com/watch?feature...&v=rUS7hId32GA