In August 1801, an upsurge in Corcoran's activities saw him and his men being declared "dangerous in case of invasion" by Dublin Castle and consequently, a force of 200 soldiers was sent to find and destroy the group.
The defeat of Robert Emmet's rising in July 1803, saw renewed British intent to wipe out all remaining rebel activity in Ireland and a new campaign was launched against Corcoran.
Consequently, arrests and severe penalties were handed out to those suspected of harbouring rebels, and the building of military roads and barrack were planned to cover the area between Mount Leinster and the Blackstair mountains.
A reward of £500 was put on Corcoran's head and the pressure soon forced him to split his group into smaller factions and return to his old base at Killaughrim Woods outside Enniscorthy.
The end finally came on 11 February 1804 when the reward offered prompted an informer to betray the location of Corcoran and his remaining few comrades who were surrounded by a party of yeomen at Killaughrim Woods.