Question

how did the us military interact with afghanistans military forces during the war in afghanistan?
the us military was hostile and unhelpful.
the us military remained neutral.
the us military trained them.
the us military took their place.

Explanation:

During the war in Afghanistan, the US military trained Afghan military forces as part of efforts to build up local security capabilities. The US was not neutral (they were actively involved in the conflict), they were not hostile and unhelpful in terms of working with Afghan forces (though there were issues in the overall war effort), and they did not simply take the place of Afghan forces but aimed to support and train them.

Answer:

The US military trained them.