Let's leave them there the next 100 years why don't we? Afghanistan doesn't want us there, they want Taliban rule, that's why they capitulated so fast. Not to say EVERYONE there wants to be under the Taliban, but compare them to Poland in 1939. Who was facing 2 of the world's strongest militaries and who was facing a group of (supposedly) 70,000. Who capitulated quicker? And we'll have yet to see in Afghanistan, but which one had a resistance during occupation?
They had 20 years to get ready, they didn't have the will to fight because they don't want our system.