

I don’t care about what international law says, this is what world war means as I understand it. I said that to begin with. International law is often even more nebulous and open to interpretation than most national law given there isn’t really a universal framework for adjudicating it.
I’d be curious for a citation, though. I looked for some and found way more instances where international courts and laws held that supplying weapons counted as being involved in a war than the contrary. For example:
- The law of neutrality (Hague V & XIII of 1907) prohibits neutral states from furnishing “supplies of war” to any belligerent. Violating that duty strips a state of its neutral status and exposes it to lawful countermeasures by the aggrieved party.
- Under state-responsibility rules (ILC Articles on State Responsibility, Art. 16), a state “aid[ing] or assist[ing]” another in committing an internationally wrongful act—armed force included—is complicit, provided it does so with knowledge of the circumstances.
Iron, aluminium, titanium, oxygen, silicon, phosphorus, potassium, I could go on listing elements at great length. There are plenty of resources out there. Celestial bodies are made of resources. You name it, you can find it out there in various abundances.
Helium-3 is just one of the few things you can find out there that is basically unavailable on Earth. It’s myopic to focus solely on that.