The United States Navy is re-establishing its 2nd Fleet, responsible for the northern Atlantic Ocean, nearly seven years after it was disbanded as the Pentagon puts countering Russia at the heart of its military strategy.

"Our National Defense Strategy makes clear that we're back in an era of great power competition as the security environment continues to grow more challenging and complex," Chief of U.S. Naval Operations Adm. John Richardson said on Friday.

"2nd Fleet will exercise operational and administrative authorities over assigned ships, aircraft and landing forces on the East Coast and northern Atlantic Ocean," Richardson said.