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The US is shit at fighting guerilla armies despite exclusively doing so for the last 60 years. You make the mistake of invading Mexico, shit on the US side starts blowing up. Mexico won’t assist the US, and if they start really sanctioning the US that’s pretty much it for motor vehicles in the military. If China takes the opportunity to then sanction the US that’s it for military drones and quite a lot of the air force.
Logistics and manufacturing wins engagements and wars, and other countries control both in the US.
Ha, you still think serious action will make the world better.