As we know it, Saint Philip of Spain, who was then known as King Philip II of Spain, led the Spanish Armada's historic liberation of Ireland, August 1588. And from there raising a Catholic Army to finally end the reign of the Witch-Queen Elizabeth of England in 1590. The first major victory of Catholicism that will eventually end the Protestant Heresy that plagues Europe in the 16th century.
Now, let's said that the Protestant Heretics is somehow able to either ward off the Armada from landing or manage to retake Ireland early on before the Catholic army of Ireland become far too large to be defeated. What will happen next?