Two Russian generals sipping coffee in Paris. One asks the other, "So who won the air war?"
https://www.historynet.com/learned-battle-73-easting.htm
TL;DR: As part of that engagement, a troop of 9 US tanks and 12 APCs encountered one of Iraq's finest tank brigades. They destroyed ~50 Iraqi tanks, 25 APCs, 40 trucks and more in 23 minutes without taking any casualties.
The Republican Guard was absurdly outmatched.
Re: training... arguably, the encounter occurred in the way it did due to (then) Captain McMaster's aggressive advancement leading to the necessity of ignoring regimental orders not to become decisively engaged.
What made the decisive difference was technology, specifically, infrared sighting and laser range-finders available to and used only by one side.
China is building international super highways for trade, continent wide trade belts and inter-continent markets.
I don't think the US is lucky enough to get a war now. Countries will just maintain some minimum deterrence in the form of missile forces. So that they don't get out right invaded or sanctioned. Beyond that it will just be trade war and which country has citizens lined up to work 20 hour shifts. What makes all this so easily possible is we are not making new leap frog success in science(physics) anymore. Eventually engineering everywhere will catch up with science. In short every one can and will have weapons to deter invasions and sanctions.
The problem for west is not that a war will happen, but that it won't.
Every once in a while the world arrives at a paradigm change where everything changes. And no matter how good you are at the old game, it doesn't matter because the game has changed. We are likely at that place now.
The US and China have no ability to occupy each other's lands, nor interest in doing so. Neither do they benefit from out right destruction of infrastructure because that escalates to a nuclear conflict which wins no one anything.
The most plausible engagement is US intervention in the strait of Taiwan to thwart a Chinese invasion and occupation. And that war is essentially conventional: it results from US fleets being out of position and internal politics making it look like a good opportunity.
Having a large, old inventory of weapons the government maintains can be profitable for the contractor because they can sell support for those systems that no one else can. This support alone can employ hundreds of engineers and bring millions a year to a contractor. You can’t do that if the weapons are all fired.
This is all in service of keeping the government happy. The government, state department specifically, can decide which countries the contractor can export the weapon systems too. The set of countries the government will allow this for will be bigger if there is no conflict the government is involved in.
Defense contracting is a very counter intuitive business.
What will Russia and China donor they come out ahead with AI weapons? Whatever they want.