Peshmerga forces largely rely on old arms captured from battles. The 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 ISIS 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 ISIS. 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.