WAR - Who are combating the enemy face-to-face?

The percentage of soldiers actually combating the enemy face-to-face is shockingly small.
NATO has app. 12,000 soldiers along NATO’s easternborder. This looks a lot, but from these soldiers, only 10% see real combat. In this case only 1,200.
Among these NATO troops are app 8,000 US troops. Which means a “formidable” US combat force of 800. Only a handful of the remaining 400 NA TO troops have real combat experience. I bet Putin can’t sleep at night.

Percentage of service member that see combat:
60% see combat 7,200 soldiers
30% deployed in the combat premise 3,600 soldiers
10% engage in battle 1,200 soldiers