There's been no such Declaration.
It is longstanding precedent that a Declaration of War by the U.S. is only neccessary for the making of war when we have not yet been attacked, nor has war been declared against us. The Founding Fathers noted this in the incidences with the Barbary Pirates. A full declaration of war by our Congress results in many, many laws which severely abridge freedoms to go into effect - and so the Congress did a half-measure, by authorizing and funding a war.
Interesting statement. Then why did Congress enact the War Powers Resolution in 1973?
Anyway, you're not clearly reading these posts.
I'm saying that there is no legal definition for anything called "a state of war," and certainly there is no actual "state of war" without a formal Declaration Of War from Congress.
Authorizations Of Force are not Declarations Of War, and you guys know it. Stop pretending they're the same thing, they are most certainly not.