The siege of Mantua lasted nine months and resulted in the battles of Castiglione, Caldiero, Arcola and Rivoli. The garrison finally surrendered when they received news of the battle of Rivoli.
Mantua is a lovely city to visit, but there is very little of interest for anyone exploring the siege. The one exception is the citadel. It is in a very run down part of the city and quite difficult to find. It is here that Andreas Hoffer was executed in 1810, and there is a small plaque near the gate to mark the spot.
This was the last Italian battlefield we visited, and you can read about it here