Commander of Infantry – Lt. Col Colletti
Commander of Artillery – Lt. Col Benedetti
Commander of Sappers – Lt. Col Castelnuovo
Commander of Genies – Lt. Col Vinci
Commander of Sailors and Legionaires- Capt Accolta

Voltiguers of the Guard; and the re-constituted 12th line was formed in 1814 from the Marches region, territory formerly of the Papal states. The recruits were deserters, prisoners, and forcibly enrolled former members of the Army of Italy. Most of these were from the towns of Ancona, Macerata, and Loreto. The unit never totaled more than a battalion.]

Part of the 10th of Line - Chiatti was the commander [The 10th of line was formed from the 4th and 5th depot battalions of the 9th of line in 1814. To complete the unit in March, a draft of impressed men was included.]

4 Provincial Legions [One of the Legions was the “Terra di Lavoro”, legions were generally undermanned, lacking arms, and lacking leadership]

A detachment of Gendarmes [local police forces with units of good and indifferent quality]

100 men of train [transportation for stores and artillery]

2 companies of Artillery (1 Coastal Co) [Neapolitan coastal forces were usually undermanned and lacking arms]

300 Sappers [Neapolitan engineers had a generally good reputation]

400 Sailors [manning a number of gunboats and small craft in Gaeta]

410 naval Cannoniers

Total Artillery pieces: 244

Artillery Reserve: 52 Cannon, 6 howitzers, 15 mortars, and 8 carronades. D’Ayala lists the total garrison of Gaeta as 1450 men, and sources report 800 men present at the surrender. The civilian populace present during the siege was not counted, but could have numbered a thousand or more.

The Last Neapolitan Battle Siege of Gaeta 1815

Fortress Gaeta
The Siege
Appendix 1: Garrison OOB
Appendix 2: Begani's Letter
Map of Gaeta (slow: 117K)