TY - BOOK ID - 135034555 TI - Spies, scouts and secrets in the Gettysburg campaign : how the critical role of intelligence impacted the outcome of Lee's invasion of the north, June-July, 1863 AU - Ryan, Thomas J. AU - Sears, Stephen W. PY - 2015 SN - 1611211794 9781611211795 9781611211788 1611211786 PB - California : Savas Beatie, DB - UniCat KW - Gettysburg Campaign, 1863. KW - Military intelligence KW - History KW - United States KW - Military intelligence. KW - Secret service. UR - https://www.unicat.be/uniCat?func=search&query=sysid:135034555 AB - As intelligence experts have long asserted, ""Information in regard to the enemy is the indispensable basis of all military plans."" Despite the thousands of books and articles written about Gettysburg, Tom Ryan's groundbreaking Spies, Scouts, and Secrets in the Gettysburg Campaign: How the Critical Role of Intelligence Impacted the Outcome of Lee's Invasion of the North, June - July 1863 is the first to offer a unique and incisive comparative study of intelligence operations during what many consider the war's decisive campaign.Based upon years of indefatigable research, the author evaluates ER -