I'm about to do research for an alternate history I'm working on(An American Civil War AH). Specifically, I'm utilizing the three-volume Civil War: A Narrative series.
When taking notes, should I only jot down details I consider important(political, military, etc.) or jot down most details that may come in handy later(appearances of say, Lincoln or Davis, culture, inflation rates in the Confederacy and other small details etc.).
How do you take notes for your alternate histories? Is the series I'm using
(I plan to go much deeper then just those three books, finding myself inspired by Decades of Darkness) good enough?