Ultimately, the populace have to be receptive to change; The U.S and the forces stationed within it were initially fighting unrestrained, for example, when a sniper would take potshots at a patrolling group of soldiers they'd fence the area off, and call for air support.
That created more resentment.
As such, the policy changed.
They had to fence the area off, and search it thoroughly; Often allowing the insurgent to mix in with the local populace and escape any punishment, and then it occurred again, and again, and again.
People seem to overestimate how much effort the U.S used, they were fighting with one arm tied behind the back; Pumping funds into a corrupt government to hopefully, HOPEFULLY want change.
Instead of the billions of dollars invested in schools, roads, hospitals, security forces, it went and lined the pockets of those ruling.
It's at the point now, where the forces leaving have to destroy infrastructure lest the insurgents retake it when they leave; That's the state of security within Afghanistan.
Really, it's a point of history where it reminds me of humanity at its worst.
Europe already took care of Africa long before the US was around or are we not blaming colonialism for some of the issues with Africa
The only reason the US is there is because China is going hard on Africa these days, as people always say "if China said they were going to put a man on Mars in 5 years then the US would put a man on mars in less then 5 years"
Africa is the last place besides the arctic that still has resources up for grabs. Theres a reason why America, Europe, and China are all vying for influence in the region.