Every now and then someone shows up here and predicts World War III, but World War is not a game that starts because someone wakes up in the morning and wants to play Call of Duty. As stupid as politicians are, they know that such a war would actually mean the complete destruction of the human race, given the weapons we have today. Consequently, you need to understand that it is not in anyone's interest to make war, because that would be a conflict without a winner.
You can win a nuclear war
Efficient strategy :
Step 1 Gather Intel on Enemy
Step 2 Find out how has the launch codes & capability to issue the order for nuclear strikes
Step 3 Find out how will "push the buttons" to launch nukes
Step 4 Issue order for attack when you the enemy is weak
Step 5 Simultaneous stealth attack: Divers will attack/sabotage anything that moves under and on the sea / Paratroopers/Assassins/Special Forces will attack the "Order Givers" ,they will also cut of communications and attack ground targets and anything that can fly
Step 6 Occupation and Psychological Warfare
Step 7 Population Assimilation or Population Annihilation
Step 8 Mission Accomplished New Territory Gained
https://www.youtube.com/watch?v=xXLGP19anWU