Ran across a post about the American Plan which didn’t ring any bells. First found this Wikipedia article https://en.m.wikipedia.org/wiki/Chamberlain-Kahn_Act that describes the laws. In its references section is this link
https://newrepublic.com/article/1484...tten-war-women that is a synopsis for a book.
I have not yet read the book.
This feels like a key piece of American history. Especially when the three federal laws that enabled it are still on the books.