
King Henry II's invasion of Ireland in 1171 marked a critical point in Irish history, as it led to the establishment of English control over significant portions of the island.
As Richard de Clare (Strongbow) enjoyed life in Ireland, married into Irish Kingship, and gained land, King Henry II of England became unnerved that some of his loyal subjects were becoming too accustomed to Ireland's way of life after their initial invasion. The only solution was for King Henry to invade Ireland himself.
The Invasion of Ireland
King Henry of England organized a large fleet of 400 ships to transport his army and weapons, it's believed he had as little as 500 mounted knights and 4,000 men-at-arms along with archers. They set sail from Wales landing on Irish shores in October of 1171, the first time a King of England set foot in Ireland.
Henry quickly secured alliances with local Irish chieftains who were disillusioned with the Norman presence. He took control of key cities, including Dublin, which became Ireland's English administration center.
Henry received papal support from Pope Adrian IV, which legitimized his conquest and provided a religious justification for his actions. This helped to align his goals with the interests of the Church, which sought to reform and control Irish practices.
In 1171, Henry proclaimed himself Lord of Ireland, asserting his sovereignty over the island and establishing the framework for English governance. This marked the beginning of formal English rule, which would evolve into centuries of complex relations between the English Crown and Irish society.
Henry appointed a Lord Deputy to oversee the administration of Ireland on his behalf. The Lord Deputy was responsible for maintaining order, managing relations with both the Anglo-Norman settlers and the Gaelic Irish, and implementing royal policies.
Lands were granted to Anglo-Norman lords in exchange for loyalty and military service, establishing a feudal system that strengthened the Crown's control over Ireland. This system often conflicted with traditional Irish clan structures, leading to tensions.
The Lordship brought English legal practices to Ireland, which replaced or conflicted with traditional Irish Brehon law. This shift aimed to create a unified legal system under English authority.
Anglo-Norman lords constructed numerous castles, such as Dublin Castle, Trim Castle, and Kilkenny Castle, to secure their territories and exert control over the local population. These fortifications served both military and administrative purposes.
Gaelic Resistance
The establishment of the Lordship faced significant resistance from the Gaelic Irish, who were determined to maintain their autonomy and way of life. Many Irish chieftains resisted Anglo-Norman advances, leading to ongoing conflicts.
Over time, many Anglo-Norman families began to assimilate into Irish culture, adopting Gaelic customs, language, and laws. In 1366, the Statutes of Kilkenny were enacted to curb Gaelicization and reinforce English rule. However, these laws were often ignored and reflected the complexities of Anglo-Irish relations.
The Lordship of Ireland officially transitioned into the Kingdom of Ireland in 1541, under Henry VIII. This change marked a shift toward more direct control by the English Crown and set the stage for further conflicts and colonial policies in Ireland.
Sources
- A New History of Ireland, Volume II: Medieval Ireland 1169–1534. Francis Xavier Martin (2008).
- The Deeds of the Normans in Ireland: La Geste Des Engleis En Yrlande by Evelyn Mullaly
- A Military History of Ireland By Thomas Bartlett, Keith Jeffery





