It's a political decision to increase female representation. It's not a secret.
Perhaps West Point and Army are trying to get ahead of the demographic shift. I can’t find nor recall where I read it, but best to my memory I remember something along the line of that the current recruiting trend and demographics won’t allow the U.S. military to meet future manpower requirements with male recruits alone. Hence the military’s embrace of opening previously positions closed to females has some practical reasons, not just the political correctness reason. One of the reasons why the Russian military is trying to reduce is size and become a volunteer force instead of conscripts is that that their demographics won’t support the size of their military
According to an Army Times article
Only 4.7 million of the 31.2 million 17- to 24-year-olds in a 2007 survey are eligible to enlist, according to a periodic survey commissioned by the Pentagon.
Safe to assume that civilians eligible to enlist will continue to decease
2014 DoD Accession Goal was about 54,000 active and 40,000 for reserves, to keep the math simple say 100,000
100,000 out of 4.7 million is about 2%. Not bad
Break 4.7 million into 50/50 male/female for general population, use 85%/15% male/female service member accession, than
For males, 85K out 2.35 million is 3.6%, not good
For females, 15K out 2.35 million is .6%, could increase easier than keeping males at 3.6%