William was looking for a quick end to the fighting in Ireland, as he was the leader of the Grand Alliance against Louis XIV and his presence was urgently needed elsewhere in Europe.
Despite the Williamites capturing the Irish capital of Dublin, the uncompromising terms set out at Finglas encouraged many leaders to fight on, and this was reinforced by the successful Jacobite defence of Limerick the same summer.
Much of the ordinary population remained loyal to the landowners and to King James while William increasingly had to concentrate his forces in Southern England and Flanders to confront the French, leading to the war dragging on for another year in Ireland.
The Treaty of Limerick in 1691 granted more generous terms to the defeated Jacobites than had been offered at Finglas, allowing them to retain their pre-war estates.
Nonetheless, a sizeable number of the Jacobite leaders went into exile on the continent in the Flight of the Wild Geese, continuing to swear loyalty to James II and his successors.