In the face of a “resurgent Russia” and other emerging challenges, NATO needs to stay agile and ready to “fight tonight,” the alliance’s new supreme allied commander for Europe said today.

Army Gen. Curtis M. Scaparrotti assumed command of NATO’s Allied Command Operations from Air Force Gen. Philip M. Breedlove in a ceremony today at NATO’s Supreme Headquarters Allied Powers Europe here.

Scaparrotti took the helm of U.S. European Command yesterday from Breedlove, who is retiring from the military after 39 years of service.

NATO Secretary General Jens Stoltenberg welcomed Scaparrotti and praised Breedlove’s vision and leadership during a time of immense change and challenges in the security landscape, including with an aggressive Russia.

The chairman of the Joint Chiefs of Staff, Marine Corps Gen. Joe Dunford, attended the ceremony. While not part of the public speaking program, he privately congratulated Scaparrotti and thanked Breedlove for his decades of service.