You're not gonna get 2% fatality rate without serious quarantine measures. That rate assumes you can get all the serious cases to the ICU and into a ventilator. If you let it grow exponentially, we need to start imagining what is the fatality rate basically without any hospital care. Scaling hospitals will be absolutely impossible once the cases start heading into six and seven figures.

Lincoln used marshal law during the civil war and even that was deemed unconstitutional in some areas. As long as there are functioning civil courts, marshal law is not considered justified, as I understand it.

It's "martial" (https://en.wiktionary.org/wiki/martial#English) rather than "marshal" (https://en.wiktionary.org/wiki/marshal#English). The two are homophones, but the first means 'military' and the second is a particular rank or role within an army or government.

Imperial College doesn’t think that’s going to do enough good