` When you are in the mountains for months , you 've just had enough , '' he said . These include fears that the Taliban are infiltrating the Afghan forces . Military analysts and government officials say the issue is more complicated . An analysis concludes that psychological stress caused 36 % of the attacks .
These include fears that the Taliban are infiltrating the Afghan forces . Military analysts and government officials say the issue is more complicated . An analysis concludes that psychological stress caused 36 % of the attacks .