I assumed Vietnam and Korea were officially declared but after looking it up I see they weren't.
It's kind of crazy they even managed to draft people without congress approving it. The world wars really did kill the old American system of government.
In all fairness, Congress is slow by design, and wars happen a lot faster than they used to. It would be insane if a hypothetical adversary could prevent the US from engaging in war just by preventing a Congressional quorum.
Presidential powers are certainly too broad and too deep, but I don't think a country can function in 2025 with the system the founders envisioned - shit just moves too fast these days.
I think if we actually had a good reason to be fighting congress would act quickly enough and a state that can't find enough consensus to even defend itself shouldn't exist at all.
It's kind of crazy they even managed to draft people without congress approving it. The world wars really did kill the old American system of government.