Peshmerga captured stockpiles of weapons during the 1991 Iraqi uprisings. Several stockpiles of weapons were captured from the old Iraqi Army during the 2003 U.S. invasion of Iraq, in which Peshmerga forces were active. Following the retreat of the new Iraqi Army during the June 2014 Islamic State offensive, Peshmerga forces reportedly again managed to get hold of weapons left behind by the Army. Since August 2014, Peshmerga forces have also captured weapons from the Islamic State. In 2015, for the first time, Peshmerga soldiers received urban warfare and military intelligence training from foreign trainers, the Combined Joint Task Force – Operation Inherent Resolve. The Peshmerga arsenal is limited and confined by restrictions because the Kurdish Region has to purchase arms through the Iraqi government. Due to disputes between the KRG and the Iraqi government, arms flows from Baghdad to Kurdistan Region have been almost nonexistent, as Baghdad fears Kurdish aspirations for independence. After the Islamic State offensive of August 2014, multiple governments armed the Peshmerga with some light equipment such as light arms, night goggles, and ammunition. However, Kurdish officials and Peshmerga stressed that they were not receiving enough. They also stress that Baghdad was blocking all arms from reaching the KRG, emphasizing the need for weapons to be sent directly to the KRG and not through Baghdad. Despite this, the United States has maintained that the government of Iraq is responsible for the security of Iraqi Kurdistan and that Baghdad must approve all military aid. The Peshmerga lack a proper medical corps and communication units. This became apparent during the Islamic State 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. Issues The Peshmerga forces are plagued by frequent allegations of corruption, partisanship, nepotism, and fraud. A common result of corruption in the Peshmerga are "ghost employees" which are employees on paper who either do not exist or do not show up for work but receive a salary. Those setting up such a scam split the salary of these employees. In addition the KDP and PUK have used the Peshmerga to