The Jacobite troops destroyed the bridge over the Shannon River that connected the eastern and western parts of the city, before the Williamite Army arrived.

Colonel Grace responded by firing a pistol shot over the head of the messenger and stating "These are my terms; these only, I will give or receive, and when my provisions are consumed, I will defend till I eat my old boots.

After two days the Williamite Army attempted to ford the Shannon River but were repelled with considerable loss.

The artillery fire continued between the two sides until 24 July when General Douglas was forced to retire having suffered about 400 casualties, lacking provisions and equipment for a longer siege and having heard rumors that Patrick Sarsfield and the Jacobite Cavalry were en route to relieve the city of Athlone's garrison.

[1] Although the Jacobites withstood the week long siege, a year later the Williamite Army returned and took the city.