1876 A.D.
Human History: General Armstrong Custer recklessly attacked an Indian village on June 25, 1876. The Indians overwhelmed his cavalry and killed all 225 officers and men in a battle that lasted less than an hour and became known as "Custer's Last Stand".
Alien History: The OoOobers of Hurumph are the thieves, thugs, muggers, buggers, and loan sharks of the Galaxy. They also have a charming troup of touring River Dancers that are available for weddings, birthdays, and sex-change parties. Nevertheless they are not the type of aliens that take kindly to a puny Terran trying to stiff them on a loan. Custer borrowed $3000 from the OoOobers to build a Museum of Odors. Unfortunately for Custer, the deal fell through and he was left heavily in debt. As you can see, the OoOobers settled the problem with extreme prejudice.