Go from Viet Nam up to the present: in every conflict the USA has been outnumbered in terms of soldier vs soldier numbers, . . . and yet the body count total has always been in our favor, in many cases by 10+ to 1.
That has as much or more to do with the way the US fights (with complete air superiority, massive artillery support, the most extensive logistical support known to man, and a willingness to spend millions of $$$ on precision guided weapons to kill a couple of guys with $50 AK-47s)....) and who we fight ...... armies/countries/movements with none of those. As in Viet Nam, body count is meaningless, unless you kill ALL of the enemy, before the $$$ and/or the willingness of the American taxpayer to spend it, runs out.
Training is great and trumps experience, but neither will kill an idea, if it has hearts to live in.