It is taking place right now.
-----
Exactly we are in the middle of it. People think bullets must fly to have a war, those times are gone. This time round the "enemy" is so small no-one ever has seen it.
Yeah, it's either proxy war in the middle East or Ukraine, where American equipment fights soviet equipment on the other side. Or the big economic wars, like the trade war between China and USA. I don't think we will see another confrontation like WW1 or WW2 where Million of people fought against each other. Technology is just too advanced, its all about drones and rockets now. Not the human soldier anymore.