You want to evacuate several million people to third party nations.

In a country where the communictions infrastructure is patchy at the best of times, the fuel delivery system isn't any better, and there is neither functioning sea port facilities nor a central government in anything but name. That assumes that every one complies without the use of armed sweeps, and that won't happen.

Please, think about what you are saying. If you strip off the euphemisms, it is a forced relocation into internment camps. It will involved hundreds of thousands of those troops you so very happily despised a few days ago, marching people onto aircraft or landing craft at bayonet point. Were will you evacuate them to? No area will want them. Those internments camps will turn into concentration camps, with wire and guards between the residents of the areas you inflict these camps on and those who were marched into them.

Best to keep them there, in their country, at their homes. That way, they can get supplies and choose to rebuild or not on their own, providing the majority of the labor.