Exercise Trident Juncture is NATO's largest military exercise since the Cold War and sees 31 nations taking part.
The exercise is designed to test capability and interoperability between the nations, in response to a potential attack.
More than 2,330 UK personnel, as well as hundreds of military vehicles, seven ships and Hawk jets, are in Norway to take part in the exercise.
So far the NATO-led exercise has been hailed a huge success for young British troops, with many saying it's a "great lesson" for them, especially as it could be the first time they've had overseas training.
Lieutenant Colonel Caroline Lewin, the commanding officer of 2 Signal Regiment who is currently based at a multi-national brigade headquarters in Akrestrommen led by the Army's 4th Infantry Brigade, said:
"There will be soldiers and officers in this force who have learnt something and will take that forward to be better prepared for future eventualities of conflict.
"For young soldiers who didn't go to Iraq and Afghanistan, this is the first opportunity they have had to do that little bit of overseas expeditionary training that makes them feel like this could be real - and that is a great lesson."
Lt Col Lewin added that in the face of the current international threats, it is important for allies to work together, adding that exercising troops is the "only way to test those frictions".
Trident Juncture is NATO's biggest exercise since the end of the Cold War and, in total, involves more than 50,000 troops, 65 ships, 10,000 vehicles and 250 aircraft.
Staff Sergeant David Grimshaw of the Royal Army Medical Corps confirmed Trident Juncture has been good for the more inexperienced troops and personnel to see how the UK works with its NATO partners:
"When we have worked in places like Afghanistan and Iraq, the more old and bold amongst us know how it works and how the integration happens," SSG Grimshaw said.
"For the younger guys to see - the vast amount of nations out here and how they work together - I think that is really good for them."
He said so far during the exercise they have seen a "steady trickle" of patients with issues including non-freezing injuries, coughs, colds and the odd trapped finger.