Two Quotes about the Practice of Furloughs as Incentive, from The Union Must Stand: The Civil War Diary of John Quincy Adams Campbell
The Practice of Veteran Furloughs
(from pg 142, Google Preview of: The Union Must Stand…)
Part of the incentive to reenlist was a badge of honor for the unit.
"...if three-quarters of the men in a given regiment reenlisted, the unit could both retain its identity and add 'Veteran' to its official title (as in the 'Fifth Iowa Veteran Volunteer Infantry')."
"...soldiers who reenlisted could immediately go home on 'veteran furlough,' rather than await the expiration of their terms of service. Returning veterans would also receive a federal bounty of four hundred dollars as well as varying amounts from state and local governments, but the 'veteran regiment' and 'veteran furlough' gambits were by far the most effective. Ultimately 136,000 Union veterans--slightly over half--decided to reenlist."Note: April 1, 1864: date that Campbell returned home.
John Quincy Adams Campbell, Mark Grimsley, and Todd D. Miller, (Google Preview of) The Union Must Stand: The Civil War Diary of John Quincy Adams Campbell, (Knoxville: Univ. of Tennessee Press, 2000), (search result: "furlough," pg. 142). http://bit.ly/Union-Must-Stand-preview142-furloughs.
"Soldier's Pay," A CCWRT Presentation by Moffat, 1965
William C. Moffat, Jr., "Soldiers Pay" (Jan. 1965), (CCWRT History: "Talks"), Cincinnati Civil War Round Table (The Cincinnati Civil War Round Table, 2000). http://www.cincinnaticwrt.org/data/ccwrt_history/talks_text/moffat_soldiers_pay.html.
More about pay and bonuses (link to article).