 It is empowered to function under control of the Governor, as a State asset in times of emergency or natural disaster, or if needed to carry out limited actions during non-emergency situations to include full scale Enforcement of martial law, when local law enforcement officials can no longer maintain civil control.The National Guard may also be called into federal service in response to a call by the President or Congress.Iowa National Guard units are trained and equipped as part of the United States National Guard.