Patrick Sarsfield was a Jacobite soldier who played a leading role in the Irish Roman Catholic resistance (1689-91) to England's King William III. Sarsfield remains a favourite hero of the Irish national tradition.
His grandfather, Roy O'More, was a leader of an Irish Catholic uprising against the English in 1641. Sarsfield served in the army of King Louis XIV of France from 1671 to 1678 and after the accession of the Catholic James II to the English throne in 1685, he helped James's commander in Ireland.