It’s inevitable and the US military has been preparing for a long time. The future of warfare will look much different and it will require in the short-term great wealth.
Japan will be a player as well.
We can’t stop it and the military said that two decades ago. The only thing we can do is prepare and try to stay a step ahead.
Your guesses are as good as mine if that will be the case.
From what I was told the drone swarms will be able support Marines ashore from the MEU or a special MAGTAF until either they complete their mission or the Army brings in the heavy stuff. The question nobody wants to discuss are the countermeasures, There will be a constant battle to address countermeasures, especially as the countermeasure become smaller, easily accessible and easier to deploy. What happens when the enemy deploys it's own swarms and when they develop and deploy swarms of drone killers?