We declared war on North Korea in 1950 - and we've not yet declared peace.
Actually the Korean War is in sort of an odd place legally. Truman didn't actually get the authorization of Congress. He just used standing UN resolutions. The last time the US declared war was on June 5, 1942 against Romania, Hungary, and Bulgaria. There have been other wars that we have used the War Powers Act or other specific resolutions, but the Korean War was not one of them.
Exactly. If they said, 'We consider sanctions cause to end the armistice', come wake me up. We've already dropped our declaration of war on them, but the armistice has it on hold. Unless they are threatening to end the cease fire, then who cares?