300 Marines have hit Norwayspecifically its northern most part in the Actic which shares a border with Russia. US claims deployment to Norway is temporary and has "nothing to do with Russia".
The 'temporary' deployment is scheduled to last for at least one year, and along with NATO's build up in the Black Sea region, Poland and the Baltics there is now hardly a Russian border without US military presence on the other side.
US officials insist the Marines are in the Arctic to learn how to operate in extreme cold and on skis. Incidentally Russia is a famously cold country known for its vicious winters.