He joined the Irish Army under the command of Richard Talbot, Earl of Tyrconnell, which had remained loyal to James and was undergoing a major expansion. Luttrell and other Catholic officers flocked to the army, while Protestants were purged. Protestant inhabitants in Ireland rose, proclaiming their loyalty to William of Orange.
Luttrell joined the Irish Army under Richard Talbot, Earl of Tyrconnell, which remained devoted to James and was undergoing a significant expansion. Many Catholic officers, including Luttrell, flocked to the army, while Protestants were removed. Protestant residents in Ireland rebelled, declaring their loyalty to William of Orange.