So the Afghan army is trying something new: a guide to the strange ways of the American soldier. The goal is to convince Afghan troops that when their Western counterparts do something deeply insulting, it’s likely a product of cultural ignorance and not worthy of revenge.

The pamphlet is intended to “strengthen our understanding of our [NATO] counterpart,” according to an English translation of the pamphlet that was provided to The Washington Post. But in doing so, it also reveals seemingly minor — and rarely acknowledged — cultural faux pas that have created palpable tension between the two forces.

“Please do not get offended if you see a NATO member blowing his/her nose in front of you,” the guide instructs.

“When Coalition members get excited, they may show their excitement by patting one another on the back or the behind,” it explains. “They may even do this to you if they are proud of the job you’ve done. Once again, they don’t mean to offend you.”