I saw a couple Afghans fucked up on hash and opium when I was there - it's pretty much all they grow
seeing as how the Taliban use drugs to fund themselves, it stands to reason they feed it to the "troops"
honestly, they had to be high a couple of the times they shot at us because we fucked them up some proper 
But hadn't the taliban eradicated the poppy trade in Afghanistan?
My understanding is the Taliban put an end to poppy farming and opium production when they were in power.
It wasn't until the US led invasion into Afghanistan, the topping of the taliban, and insertion of the US backed government in Afghanistan that poppy farming and opium production have increased.
No doubt drugs are a huge source of funds, but for who?
We know the British used opium to subdue and control the Chinese under colonialism
We know Ollie North used drug profits to fund
terrorists ...uh... I mean 'freedom fighters' in Nicaragua.
Now that opium production is on the rise, whose communities are being destroyed, and where are the profits going to?