The President of United Earth is the head of state for United Earth. (SCE eBook: The Future Begins, ST novel: Starfleet: Year One) In the early 2160s, Lydia Littlejohn was the President of United Earth, and was in office when the Articles of the Federation were signed, establishing the United Federation of Planets. (SCE eBook: The Future Begins, ST novel: Starfleet: Year One) In 2160, President Littlejohn personally monitored post-war negotiations with the Romulan Star Empire and kept an official office in San Francisco. (ST novel: Starfleet: Year One)