Okay So I am going to make a prediction. I think US will pull out after the next US election in 2020. Say about summer 2021. My reasoning is simple. Trump will do everything up till the next elections. Then as elections approach and failure evident USA will call it quits to Afghan adventure. So people play Nostradamus and give your 'due dates' and reasons. If you don;t think US is going leave Afghanistan in the distant future say so.
Zionists will be very upset if US left Afganistan before hurting Pakistan big time. They tried to cause Pakistan-Spring but failed. Tried plan-B plan-C without causing much dent.
Like Hamid Gul said something like "Iraq bahana, Afghanistan thikanaa, Pakistan nishanaa"
Nishana is to pave the way for Israel to expand in anticipation of messiah. So all possible trip-hazards have to be secured.
Irrespective of whether expansion happens before advent of messiah or after, israel only has got very little time left. Because messiah has an expiry of year 2240. Some 222 years left. After year 2240 their time will be over. Also they would want to leave some time to enjoy Kingdom-of-heavens as well, so time at hand is actually much less than 222 years.
So zionists will try their best to have Al-Dajjal, the left-eyed "Beast" off 666, stay in Afghanistan until Pakistan is dociled.
If I were to take guidence from Nostraamus's poetry, then it would have taken 14 years to leave for "The Shaved Head"(Dajjal) who attacked the "Satrapy"(Afghanistan) from "Marine tributory city"(Pak), chasing after a "Sordid man"(Osama) who was against the shaven head.
But it's been more than 14 years... so either Nostradamus went wrong, or I misinterpreted, or ptobably Dajjal's intentions towards Pakistan failed in 14 years but it hasn't left yet probably going through five stages of grief while taking its frustration out on Syria.
From the marine tributary city,
the shaven head will take up the satrapy;
to chase the sordid man who will the be against him.
For fourteen years he will hold the tyranny.