Italy Kingdom - 1866 – Italian Military Mail, Headquarters of the Volunteers (Garibaldians) – Envelope of August 8

Description
Unfranked envelope from the Third War of Independence, sent by the Corpo dei Volontari Italiani di Garibaldi during the 1866 campaign against Austria and addressed to Tremezzo, on Lake Como.
On the front, a clear impression of the double-circle postmark "POSTA MIL.RE ITAL.NA / QUART.RE G.LE DEI VOLONTARI" dated 8 AGO. 66. The letter, stamp-free, was taxed at the recipient’s expense: handwritten tax mark "2" on the front.
The date is of particular historical interest: August 8, 1866 is the eve of the famous "Obbedisco" with which Garibaldi, on August 9, accepted the order to withdraw from Trentino.

Details
Postmark: double-circle Italian Military Post – Headquarters of the Volunteers, 8 August 1866
Destination: Tremezzo (Como), with arrival mark on the back
Unfranked envelope, taxed on arrival
Embossed dry seal on the closing flap
Signature of the expert on the front

Certificate
Photographic certificate Silvano Sorani, Milan, 23 December 1982. The expert declares the envelope original and defines the cancel rare and very distinctly impressed.