Last week, the United States Navy launched exercises at the new Ice Camp Sargo in the Arctic Circle. Seen above, the nuclear submarine USS Hampton surfaces through the ice. It's a majestic sight, but let's not forget the goal here:
"(This exercise) is our continued commitment to the development of undersea warfare capabilities and tactics in all areas of the world," said Rear Adm. Jeff Trussler, commander, Undersea Warfighting Development Center. "Our superiority in delivering effects in and from the undersea domain to the operational commanders is dependent on the regular exercise and demonstration of these capabilities."
I'd imagine that as the polar ice caps melt, and possible energy reserves are uncovered, the region will quickly become a new battleground. Sadly.
"Navy Submarines Arrive in Arctic for Ice Exercise 2016" (US Pacific Command)