In 1864, Giftaler's Ranch was purchased by Jacob Bergman, also a German immigrant, stagecoach driver and Union Army veteran, who operated the Bergman Ranch there for many years until his death on September 13, 1894. After the Civil War, he ran Bergman's Stage Station there for the Banning and Tomlinson Stage lines for many years. During the Julian Gold Rush, he ran the Guahonga post office there from July 27, 1870, to September 13, 1871. The post office for the area was then moved to Oak Grove until the Bergman post office was opened in 1894, but its name was changed to Aguanga in 1901.