An example of inherent power is President Harry Truman providing steel resources during the Korean war by seizing steel companies in 1952. In the United States, presidential inherent is an implied power that is separate from specific Constitution authority.
President George W. Bush used inherent powers for treatment of prisoners following the Trade Center attacks on Sept. 11, 2001. According to the Constitution, only Congress has the power to declare war. A president, however, is Commander in Chief of the Armed Forces and may send troops into battle without Congressional approval, as happened in Vietnam and Korea. The President is then required to report to Congress within a strict period of time regarding his use of inherent power.