Vetfag here and I’ve been mulling what’s been going on.
In about a weeks time they have mobilized 25,000 troops and erected a fence around a very large area of DC, including the Capitol and surrounding area.
The sheer amount of logistics to pull this off and have the infrastructure in place, as well as the supplies needed, this was not thrown together in the last week. The miles of barricade fencing that just happened to be available on such short notice, etc.
It takes months of planning to pull off something of this size and magnitude. This was all planned for in advance.
Here is a captain from the NG saying just that:
https://www.youtube.com/watch?v=zU7sE5SL5ts
Awesome find!