View attachment 471148
Union resistance fighter in Ohio during the Confederate invasion, wielding the Ingram model 41. Following the outbreak of Operation Blackbeard the United States found itself in need of an effective submachine guns. With the Thompson proving itself to costly and complicated to mass produce on a large scale to counter Confederate forces. Developed by young Gordon B. Ingram as a more cost effective successor to the Thompson Submachine Gun.
I think it would make more sense for the Thompson to be a Confederate Gun in TL-191.
See: https://en.wikipedia.org/wiki/John_T._Thompson
The Ingram could be a competitor in the USA.