The siege of Carrigafoyle Castle took place at Easter in 1580 near modern-day Ballylongford, County Kerry, Ireland on the southern shores of the River Shannon. The engagement was part of the English crown's campaign against the forces of the Gerald Fitzgerald, 15th Earl of Desmond during the Second Desmond Rebellion. The castle was held by rebel troops in the service of Desmond and some Catholic troops from continental Europe.
The castle was referred to as the guardian of the Shannon, because of its strategic command of the shipping lanes that supplied the trading city of Limerick, some 20 miles (32 km) upriver. The bay at Carrigafoyle was shielded from the estuary on the northern side by a wooded island. Within the bay, the castle-rock was defended on the west and south sides by a double defensive wall: the inner wall enclosed a bawn, and surrounding this was a moat, which was covered on three sides (the east lay open) by the outer wall, where a smaller tower stood. The tower-keep itself was 86 ft high, and the precipitous sides of the castle-rock were layered with bricks and mortar. At high tide, the walled landing within the moat was capable of accommodating a ship of 100 tons displacement.
During the rebellion the castle was held by 50 Irish, along with 16 Spanish soldiers, who had arrived at Smerwick harbour the previous year as part of the 1579 Papal invasion; there were also women and children present. Months earlier, an Italian engineer, Captain Julian, had set about perfecting the castle's defences under the direction of Desmond's countess, Eleanor. By the time of the siege, she had retired to her husband's company - some forty miles (64 km) distant, at Castleisland - while Julian was still at his task.
The English commander, Sir William Pelham, marched through Munster in the company of Sir George Carew. He assumed command of an additional 600 troops - taken from Sir William Winter, who was directing the sea-borne part of the campaign - and his army became the largest ever seen in the west of Ireland. On arriving at Carrigafoyle, the English camped to the south-west of the castle and ranged their ordnance along a low wall running north, parallel to the outer wall at a distance of 100 yards. At the northern point of this wall a company of foot with lances was stationed.
The bombardment of the castle was carried out over two days, six hours each day, with 3 demi-cannon and a culverin (a huge naval gun with small projectiles), which had been supplied from Winter's ships and were manned by naval gunners. The demi-cannon could be effective against stone, but only if allowed to fire unhindered - in the event, no hindrance was given. In addition, Winter had 3 three-masted ships, which fired their stern cannon from an anchorage in the estuary beyond the bay.
On the first day (Palm Sunday), Pelham ordered a party of troops to cross to the sea-wall, where they were pinned down by gunfire and had boulders hurled at them from the battlements. They threw up assault ladders, which the Spanish halberdiers pushed away. The Earl of Ormond described seeing the sea-channel fill with wreckage as the sides of the castle-rock became slippery with blood. Pelham was hit by a ricochet and jeered at by the defenders, but there was no pause in the bombardment.
On the second day, Pelham was reinforced with troops from Winter's ships. The final assault, led by Captains Humfrey Mackworth and John Zouche, was concentrated on the part of the tower furthest from the cannon, where the defenders were holding out. The tower cracked under the impact of 2 or 3 shot, and the great west wall collapsed on its foundations, crushing many within. The survivors fled through the shallow waters, but most were shot or put to the sword; the rest (including one woman) were brought back to camp and hanged from trees. Captain Julian was hanged three days later.
Such was the damage to Carrigafoyle Castle that it was never repaired. Its ruins still stand, including the outer defences and moat, and the effect of the bombardment is clear to see.