For Civil War people: If you haven't read Henry Kyd Douglas's "I Rode with Stonewall," do so. He was with Jackson from Jackson's initial posting at Harpers Ferry through the Valley Campaign, Antietam, and Chancellorsville, almost all of that time on Jackson's personal staff. Wounded and captured at Gettysburg, he was exchanged and ended the war leading the last unit to stack its arms at Appomattox. It's anecdotal, with lots of personal accounts both of Jackson and day-to-day life in the Confederate army. Douglas himself was a sort of a David Niven type--charmingly self-deprecating, good humored, often funny, and a gifted story-teller. In my experience, it's unique among Civil War memoirs.

Here's the list of battles in which Douglas participated. How many veterans on either side could match it? It's possible that none who survived the war can.