The Peshmerga lack a proper medical corps and communication units. This became apparent during the ISIS offensive in 2014 where the Peshmerga found itself lacking ambulances and frontline field hospitals, forcing wounded fighters to walk back to safety. There is also a lack of communication tools, as Peshmerga commanders are forced to use civilian cellphones to communicate with each other. Under the guidance of the US-led coalition the Peshmerga has started to standardize its weapons systems, replacing Soviet-era weapons with NATO firearms.