I believe that a significant percentage of men and women over age 45, may not be suitable and not as fit, to be fighting in any war
It may be a risk to other troops when they activate men age 18 to 60, and conscript women age 18 to 60.
I would suggest that activate of mobilize men age 18 to 40 first, and if necessary, thereafter men age 40 to 45.
May be 20 to 30 is preferred, at or near peak fitness.20 to 38 may be better.
May be 20 to 30 is preferred, at or near peak fitness.