Look, this is something everyone isn't considering. We are just common knowledge people, we don't know the advanced and highly classified military protocols for the United States going to war with China. And for those who think oh China can shoot down our satellites, well I rather doubt that with that knowledge the United States Department of Defense is just guna lay down and take it, "well they can shoot down our satellites, guess we should just give up". No, we have things in place to make sure that even if they did we could still have contact, etc. with our troops.

Also D.O.D. (department of defense) for the longest time has had strategic plans and instructions for how to attack and dismantle the army and government of every country on the face of the planet and these plans are updated all the time based on military intelligence.

As far as war with China goes I rather doubt invasion would even be considered a viable option for the United States military. Mostly likely we would do everything to avoid going to war and if we did end up going to war then our best option would be tactical nuclear weapons. If we didn't we would mostly likely do our best to surprise them. First we would deploy our naval fleet to sea and launch our stealth bomber from NORAD, then take our all their air and ground bases while our subs take out their subs and ships etc. and our carries will scrabble fighters to take out any they had in the air and our bomber to take out any ground forces on the move etc. Mostly likely the United States will "win" not to mention we would seize all chinese interests in America practically erasing our debt hahaha but for now the united states is the world's number one superpower and will remain that way for the foreseeable future.