The trick is in your next to the last paragraph -- not fighting each other.
So far, history is NOT in our favor on that one.
The strengths of the ANA, as planned anyway:
Multi-ethnic, multi-tribal, merit-based entity
Subject to and comfortable with Rule of Law
There are many Afghans dedicated to "making it work this time".
But there are still many who are trying to wait us out so they can revert to the old ways.
Not sure anything but time will tell.
Bookmarks