Clean the clock and scatter the parts. The determinant is the quality of the opponent with respect to training and will (thus the emphasized 'E' -- Enemy). The number of people on each side and the equipment used are secondary though obviously more and better is an improvement over enough and good enough. Fallujah was hard enough with the relatively poor quality of opposition, had they been better, it would've been even more difficult. Lacking that, the cutting edge AT weapons would've made little difference.