This piece is primarily concerned with practical and operational application of the precautionary principle under IHL; how much knowledge is sufficient to carry out an attack lawfully during modern armed conflict. In order to establish if a standard has developed with the increase in intelligence, surveillance and reconnaissance technology, this piece uses the framework of an investigation into an incident in Kunduz, Afghanistan in 2009. The author argues that this case is demonstrative of the failings inherent in the application and practical use of the precautionary principle outlined by IHL. The lack of transparency afforded in, and after, incidents of this nature prevents objective analysis and so the development of IHL can be obfuscated. She concludes that the lack of information following incidents of this kind confuses any intelligence standard that exists under IHL.