Collector Jim Bennetch, firstname.lastname@example.org, has very graciously provided us with some great examples of Vermont Civil War covers, with backgrounds on the soldiers and technical details on the covers.
Postal cover sent by George Eaton Selleck, 8th Vermont, to his wife in Brattleboro, postmarked in Martinsburgh, WV on 17 Oct. (1864), just two days before the battle of Cedar Creek. in which George commanded Co. I (but escaped injury). The penciled "Oct 9, 1864" indicates the date of the letter (which has been lost over time).
Union Military Address Cover; occupied Florida
Captain Charles Parker, Co. E, 7th Vermont Infantry
Union Occupation Cover; (Alexandria, Virginia)/Gettysburg Campaign
Corporal Joseph K. Darling, 12th Vermont Infantry
Union Campaign Cover; Siege of Petersburg, Virginia
Corporal Alanson M. Aseltine, Co. F, 10th Vermont Infantry.
See also an extract from the "Postal History of Burlington, Vermont: The First 100 Years."