@Max_S:
Rather than specifically reply to all the points you’ve raised in detail, I’m going to try a more general approach that I hope addresses them.
Bombardments were a standard element of warfare in 1787 (“the rockets red glare, the bombs bursting in air”). Reducing an enemy stronghold solely through stand-off bombardments with no ground assault is as old as artillery. It pre-dates gunpowder - armies attempted it with catapults and ballista. It wasn’t generally a very successful approach, but it was well within a common understanding of what armies did, then and now. Not only that, it was the usual approach in naval warfare of the period. Coordinating a naval bombardment of a shore installation with a ground assault was actually the exception.
If I can launch bombs and rockets at an enemy position from land-based artillery, and from craft at sea, why can’t I do the same from craft in the air? If a battleship can conduct bombardments with no ground assault, why can’t an aircraft carrier? And if carrier-based aircraft can, why can’t land-based aircraft?
Sacking and burning cities is literally as old as organized warfare. It was widely considered rather barbaric in 1787, but it was still a well-known component of warfare that would have been considered a core function of an army. If I can hurl incendiaries at a city with a catapult, what’s the constitutional objection to dropping them from an aircraft?
Let’s take a look at some specific examples.
In 1813, during the Battle of York, an amphibious assault from a riverine flotilla resulted in the burning of the Legislative Assembly and Government House by ground troops, before they withdrew. This may or may not have been a war crime, but from what you’ve written, I don’t think you think there’s a constitutional objection to this. But if amphibious raiders could constitutionally burn York, why couldn’t the riverine force have constitutionally done the same with a stand-off bombardment (which, again, was a standard element of naval warfare)? And if that’s constitutional, what would be the constitutional objection to an aerial bombardment? Launching Congreve rockets from a hot air balloon wasn’t really practical at the time, but if someone had tried it, do you really think there would have been constitutional objections raised that a “rocket balloon” force wasn’t specifically authorized by the Constitution?
Going back a few years, what about the Barbary Wars? The first Barbary War involved a ground expedition, but was fought largely by naval bombardment of shore installations, ports, and cities. The second Barbary War was fought entirely with naval power. Do you really think there would have been constitutional objections raised at the time to a “rocket balloon” force conducting the same bombardments? Again, what is the constitutional objection to air craft performing the same missions that naval craft have been performing as a standard element of warfare since the invention of the cannon?
Jumping ahead a couple of centuries, what about the U.S. intervention in the former Yugoslavia in the 1990s? It would have been counter to U.S. war aims to put troops onto the ground in Serbia and Kosovo. Does that make it unconstitutional? From what you’ve written, I’m pretty sure that you think that it would have been constitutional for a U.S. Soldier to hike into Serbia with a TOW missile on his back, use it to disable a Serbian tank, and then hike back out. What if he drove in and out*? What if a helicopter brought him in, dropped him off, and then flew him back out? If that’s constitutional, why can’t he just fire the TOW missile from the helicopter?
*This, by the way, is why I brought up the Armor Branch upthread. A self-propelled armored vehicle would have been as foreign to the concept of an “army” in 1787 as aircraft would have been, yet you don’t seen any constitutional objection to tanks with laser-guided depleted uranium rounds.