Most of those troops are US and they are not based in Europe....

Most of those troops are US and they are not based in Europe. This would be like adding the Chinese, Iranians and other Russian alligned nations (eg Nth Korea) to the figures. By the time the USA managed to mobilize it would be just about over for Europe and China would probably then go at Tawain.

You can break down troop numbers pretty easy and I can't see Turkey getting involved in a hurry. https://www.statista.com/statistics/584286/number-of-military-personnel-in-nato-countries/

It really is all about the USA (which makes sense).