1865

April

 * The Fifth Doctor, Peri Brown and Erimem visited the United States as the American Civil War was drawing to a close. (TN: Blood and Hope)
 * 9 - The Fifth Doctor prevented U.S. President Abraham Lincoln was being assassinated in Richmond, Virginia by Aaron Eddowes. (TN: Blood and Hope)
 * 14 - Lincoln was assassinated in Ford's Theatre in Washington, D.C. by John Wilkes Booth. (BFA: Assassin in the Limelight)

Unknown dates

 * The First Doctor, Vicki Pallister, Ian Chesterton and Barbara Wright visited China. (PDA: The Eleventh Tiger)


 * The first transatlantic telegraph cables were laid by Lord Kelvin. (MA: Evolution)


 * American gunfighter and lawman Wild Bill Hickok (1837-1876) reached the height of his notoriety. In the 20th century, he would be commemorated as a folk and western movie hero. In 1999, an employee of a hospital in San Francisco obtained a Wild Bill Hickok costume to wear at a New Year's Eve party. It was appropriated by the newly regenerated Eighth Doctor, who adopted it as his standard mode of dress. (DW: Doctor Who)


 * Ian Chesterton's paternal great-grandfather Major William "Will" Chesterton had been transferred from India to China by this year. (PDA: The Eleventh Tiger)