Wow, took long enough.
The brass didn't want to admit they need a larger force. Just looking at the rotation schedule for active and reserve units, it was obvious they needed more forces. The question is how soon could they even stand up more units.
I have wanted the army increased by at least 200,000 since 911.
Sadly some people in the Pentagon think wars can be won on the cheap. There is no such thing as a cheap war.
Which is exactly why it needs to be done now, not at some future point when we desperately need them but have nobody in the pipeline.