After the Civil War bankrupted the country, in 1871, a federal corporation was established in a cloud of confusion.

There's more to it than just the capitalization. "of America" instead "for America". I had an excellent 5th grade American History teacher that I do recall tried to embellish some details about it, but like many things when we get older, we forget.

https://www.educatedinlaw.org/2019/02/united-states-is-a-federal-corporation-says-u-s-code-title-28/#:~:text=If%20the%20phrase%20appears%20in%20all%20caps,%20as%20UNITED%20STATES,#:~:text=If%20the%20phrase%20appears%20in%20all%20caps,%20as%20UNITED%20STATES,