AncestorStuff.com
The heart of the work, Part II, an alphabetical listing of the officers, runs to some 60,000 entries. Each entry contains a brief paragraph on the officer giving his state or country where born, state from which originally appointed, date of induction, rank, date of discharge, promotions, medals, battles participated in, and, in about a fifth of the entries, date of death after leaving the Army.
This monumental book is actually a lot more than a listing of the officer corps, as crucial as that is. Rather, it is a handbook on the men, events, and terminology of American military life during the years of its coverage. Hardcover, 1,069 + 626 pp., (1903) Reprint 1994"