There are now 32 states of national emergency pending in the United States, with the oldest being a 1979 emergency declared by President Jimmy Carter to impose sanctions during the Iran hostage crisis. Most are used to impose economic sanctions —
mostly as a formality, because Congress requires it under the International Emergency Economic Powers Act.
In his term in office, Obama has declared 13 new emergencies, continued 21 declared by his predecessors and revoked just two, which imposed sanctions on Liberia and Russia.
But Proclamation 7463 is unique among those national emergencies. Along with a use-of-military-force authorization by Congress signed by President Bush four days later, it gives the president the power to call up the national guard and to alter the size and shape of the military's top officers. It also gives him the power to hire and fire commissioned officers — even ordering them out of retirement if necessary.
As of 2014, there were 10 generals serving in such positions, but the Pentagon could not determine what that number is currently.