Four Peas to Creating an Authentic Alternative History: Preparation

We have come to the end of our series. If you haven't been following the series from the start here are links to Premise, Probability, and Possibilities. We now move on to our fourth Pea, what I like to call:

P#4: Preparation

I can hear you scream, "what was I doing during the previous three steps?" That was preparing your premise to make a story. Now comes the fun part (at least for me) researching your characters. I have created little who's who bios for just about every fictional character I have created. I know when they were born, where, where they were educated, who they married, how many children they have, who were their classmates, etc. While this may seem an exercise in absolute tedium, there is a point. Without doing this step your Alt-Hi will become Sci-Fi. Not in the sense of the typical definition of the genre, but because your character will seem an outside "alien" observer to the events you describe instead of being able to seamlessly interact with their surroundings. 

Why do you have to do this? You are changing the outcome of one premise, but your character must still be believable within the "correct" timeline. In the case of my story, the key character, John Lee Anderson, is the brother of Robert Anderson of Fort Sumter, went to West Point at the Same time as Grant, served with him in the Mexican War, and during post war assignments in the South, married a distant cousin of Jefferson Davis and retired from active service, and is the father of three sons and one daughter, all of whom have followed their father into military service, to the great disappointment of their mother. Called back into service and assigned to the "Northern reaches of the Nebraska Territory" by President Pierce, he sees his responsibility to the people of the Western States and Territories as outweighing his duty to Washington. That is the bare bones type of research that I do, and I put it into a nice bio that looks like this. (For space concerns I have not done John Lee Anderson but Kenneth Mark Bassett, a supporting character.)

Bassett, Kenneth Mark
b. May 11, 1831 Portland, ME. Graduates from U.S. Military Academy, 1851. Stationed at Fort Kent, ME on Border Patrol 1851-1855. Assigned to command of Brigadier General John Lee Anderson in Nebraska, 1855. Commissioned Captain, 1855. Chief of Police, Upper Nebraska Territory, 1855-61. m. Kimberly Ann Chase, March 21, 1858. Commander Military District Number Five, Wyoming, Dakota Territory, 1861. Commander of Camp Teton (1861-63) and Fort Shoshone (1863-1889). Commissioned Major, 1862. Founder of Territorial Police, 1870. Commissioned Major, Republican Army, 1875. Second Colonel, 1878. Colonel, 1880. Governor of Wyoming (1893-1905). d. Tuesday June 13, 1922 Cheyenne, WY.

I think you can see that, by creating a "life" for your character, you have also created a purpose for his existence in your story (other than a story needs a character). If you do all these steps, you are now in possession of a premise that will survive not only one story, but even being turned into a multi-novel series. You can now begin to write.