I keep thinking about deployment planning, execution, and re-deployment. There are not a few, but several people who need to be fired.Oh please. I've worked in the military and training military folks from all services for decades. You make sure there are preparations in place before deploying. Even in rough deployments the troops would have sleeping gear of some sort...certainly facilities to take care of the call of nature and avoid spreading disease; it's not like you could dig latrines in DC.
These folks weren't deploying into a shooting war, they were deploying to protect a ceremony and diner party for a senile socialist chinese sock puppet.
And of course the Marines wouldn't complain. Why do they call the Jar Heads? Hold them up to the light and you can see right through. (insert inter-service rivalry joke disclaimer here)
It's not like we haven't been deploying forces all over the globe for over 30 years. Where are you going? What is the mission? What's already there (AKA pre-positioned WRM/war reserve materiel/equipment/facilities) and who is already there? What's not there you've got to ship. How long does it take to get there? Back up the timeline that many days.
This ain't rocket surgery, but if you don't follow these steps you end up with the Charlie Foxtrot we saw in DC.