There is a US state, Alabama or Georgia maybe, can’t recall the details, that to this day is prohibited from doing business or selling bonds in the city of London. Seems they defaulted on their bonds in the 1870s or something like that. Bankers have long memories.
The Alabama claims were a diplomatic dispute between the United States and Great Britain that arose out of the U.S. Civil War. The peaceful resolution of these claims seven years after the war ended set an important precedent for solving serious international disputes through arbitration, and laid the foundation for greatly improved relations between Britain and the United States.