Scorcese’s “Gangs of New York” includes some great scenes of the New York Draft Riots. And the Irish being recruited right off the boats. Well worth watching if you haven’t seen it.
To stop the riots Lincoln sent troops fresh from the Battle of Gettysburg and had them firing cannon on the rioters. There’s good reason the Posse Comitatus Act passed after the War.
The Posse Comitatus act was passed as part of the dismantling of Reconstruction in return for southern support for the election of Rutherford B. Hayes.
You are aware it's a work of fiction, right?
Yes, it’s a fine movie. Sobering as someone who is a descendent of those people, lol!