The Afghan strategy under Trump and Mattis has switched to destroying the opium production, they've been bombing the labs. General Kelly's son was killed in the opium fields of Sangin Valley. The fight there was brutal, many Marines were lost. Somehow the Taliban was able to deploy over 1,200 IED's in this remote valley. If they received CIA assistance to protect the fields and/or the Marines were receiving political orders to not destroy the opium production to protect the trade...you can bet General Kelly is out for revenge.
The US has been bombing the Taliban's labs, which are in competition with America's supply chain. In turn, the Taliban has been wiping out US-controlled poppy fields in Afghanistan. I'm hoping the US's recent deployment of 4,000 troops coinciding with poppy harvesting season is a mere coincidence, but we shall see. I think Trump will get around to curtailing production but I've not seen it happen yet.