US forces in Afghanistan confused about mission: Report

It took 15 years of carnage and chaos to realise they were confused?

US forces in Afghanistan confused about mission: Report: 
The American forces even attacked a Doctors Without Borders hospital in the city, striking it with a US Air Force AC-130 gunship for more than an hour. The attack left 42 people dead, and 37 more injured.
"'How far do you want to go?' is not a proper response to 'How far do you want us to go?," one special forces member told investigators probing the attack.