The military war of armies, offensives and great battles
The diplomatic pressure to coerce neutral states into the conflict. The excitement of winning a new ally such as the Soviet Union but also the pain when a trusted partner such as Italy changes sides.
The economic crisis, when critical resources such as oil and iron are in short supply. The price of war is constrasted with victory through economic growth.
The race to develop new technologies and surprise your enemies; using weapons such as strategic bombers, jet aircraft, rocketry or atom bomb.
The moral desisions which shaped each nation's war conduct. Seizing power through extreme violence, destruction and treachery, compared with close co-operation, trust, sharing and even sacrifice in search for peace.
When you master the complex interplay of all five dimensions, success is found in many different ways.