I wasn't disputing what you said. My point is that a hundred years ago an attack like that would have received an immediate declaration of war. The world has changed dramatically so that you can fire missiles at another nation and they don't even have a declaration of war.
I don't remember a 100 years ago, but here is a quick wiki quote.
"Since World
War II, the United States has engaged in numerous military conflicts, but none have been accompanied by a formal
declaration of war. Instead, Congress has authorized the use of" -wiki