|Successors unnamed||6-?||19??-incumbent in 2096|
Much of this is deductive based on OTL knowledge. The only unhistorical Kaiser referenced by name is Wilhelm IV, whose biography and chronology are never discussed. However, the presence of his statue in San Francisco, which Germany conquered in 1956, is a strong indicator that he was reigning during that conquest. That there was a Wilhelm IV implies that a Wilhelm III did reign at some point.
In 1914, when the break-point from the home timeline occurred, Crown Prince Wilhelm was expected to reign one day as Wilhelm III. His son, Prince Wilhelm of Prussia, would therefore have reigned as Wilhelm IV, and likely would have been on the throne in 1956. Therefore, the wiki administrators consider this proposed chronology to be within the bounds of reason.
Under the reign of Kaiser Wilhelm II, Germany soundly defeated the Entente in the Great War and emerged as the dominant power in Europe. Wilhelm's death and the ascension of his son helped trigger the Second Great War, but again, Germany emerged victorious, and Wilhelm III reigned over a victorious Germany and a more precarious peace.
Incumbent at series' end, 1945
Friedrich III is not mentioned in Southern Victory, nor any known Harry Turtledove work, but the Point of Divergence should not have affected his reign. The identity of Wilhelm II's successor is open to some debate; see here and here for the reasons supporting the moderators' decision to refer to him as Wilhelm III.
- Führer of the Greater German Reich, the office Adolf Hitler held in his capacity of the head of state and government of Germany from 1934 to 1945. Harry Turtledove has created several lines of Führer in multiple works.