That was training on operating and clearing terrorist strongholds as well as urban warfare.
I am always amazed that so many on this forum believe that the U.S. military ranks and even most of the senior NCOs and officers will blindly follow the orders of the would-be fascist dictators. The swear to uphold the Constitution first and the lawful orders of those appointed above them. A civil war, like the last one would be a violation of the Constitution and unlike the state-centric attitudes of 1860, there is no alliance of contiguous states that are mostly uniform in their support of a single political rally point. The density of dem support is localized in many big cities and the areas near them. A 2nd civil war would be more a confederacy of city-states, surrounded by a mostly non-supportive population. City-states do not command the allegiance of the military, even in CA. They lost then and will lose again. You won’t be rounded up by the military; they will be part of putting down the rebellion.
having grown up in a military town in a military family, and having served myself, I could never feature it myself. Most of the guys I served with would have been horrified by the prospect.
Like any large group the military is a combination of every part of society.
As in society, there will be rogue elements to watch out for but I do agree that the average military member ain’t going for this rounding people up stuff.