What’s interesting to me is how much new pertaining to Gettysburg has been learned by Historians in my own lifetime.
What do you think that's based on? New sources like personal journals? Combing over old accounts?
Has to be primary sources, which would include journals and accounts. Other valuable primary sources would icludd Quartermaster’s records and trade and mercantile inventories.
I think looking at old evidence with new questions in mind helps too. For example AFAIK nobody questioned why Lee would commit less than 20% of his available manpower to his final attack of Day 3.
Turns out Pickett’s charge was intended to be just one element of a larger plan. Tom Carhart’s “Lost Triumph: Lee’s Real Plan at Gettysburg” didn’t come out in print until 2005.
https://www.amazon.com/Lost-Triumph-Lees-Gettysburg-Failed/dp/0425207919
