US soldiers have been encouraged to spread the message of their Christian faith among Afghanistan's predominantly Muslim population, video footage obtained by Al Jazeera appears to show.
Military chaplains stationed in the US air base at Bagram were also filmed with bibles printed in the country's main Pashto and Dari languages.
In one recorded sermon, Lieutenant-Colonel Gary Hensley, the chief of the US military chaplains in Afghanistan, is seen telling soldiers that as followers of Jesus Christ, they all have a responsibility "to be witnesses for him".
"The special forces guys - they hunt men basically. We do the same things as Christians, we hunt people for Jesus. We do, we hunt them down," he says.
"Get the hound of heaven after them, so we get them into the kingdom. That's what we do, that's our business."