Alan, my God, you've said some things here that you really need to revise. Don't let the NRA hear you telling people that the National Guard is the militia, because there goes the Second Amendment, which only protects arms for the "well-regulated militia." You should also note that the U.S. Congress hasn't declared war on anyone since World War II...they apparently weren't paying attention during Korea, Vietnam, Iraq I & 2 and Afghanistan (which isn't really our longest war, because, you know it isn't technically a war.) Without revision, you could get your Tea Party card taken away.
Well, I'm a coffee drinker mainly. In any case, I thought the National Guard did come from the original militias. But I may be wrong. I wouldn't want to get into trouble with my gun-toting neighbors especially since I don't bear any arms.
It's true that the cowardly congress hasn't done it's duty too well and has let the presidents "go to war" without direct authority. But I believe the Supreme Court has gone along with it since Congress budgets money for these wars. In essence giving approval for them since they agreed to finance them. Not sure it's been tested yet.
Additionally they have given weaselly words of supporting armed action to defend the country. I suppose those are solid enough for most presidents to send tanks and jets. If they want to stop it, they just have to shut off funding. That's what happened at the end in VietNam. With no funding, the SOuth Vietnam srmy collapsed and the north conquered the south.
Interestingly, Trump is very much against these war. Even before he became president, he opposed many of our adventures overseas like in Iraq. He keeps griping how we spent 8 trillion dollars in the middle east and a lot of blood lost for little gain. He's used our armed forces sparingly but effectively against ISIS and other terrorists, put a little clamp on Iran, but has mainly withdrawn many troops. He talks big. But it's mainly bluff and bluster. He really doesn't want us to fight. He'd rather use economic leverage to get our way.
All the accusations that he's a warmonger and dictator is just politics. We'll have to wait for the history books in twenty years to get the true story about his presidency.