Gradually Philip grew more hostile under provocation; slowly he came to the conclusion that he could never subdue the Dutch or check English attacks on the Spanish Main without a conquest of England. Simultaneously the counter-Reformation began its attacks; the "Jesuit invasion" took place in 1580, and Campion went to the block. A papal and Spanish attempt upon Ireland in the same year was foiled at Smerwick. But more important was Philip's acquisition of the throne of Portugal with its harbours, its colonies and its marine. This for the first time gave him a real command of the sea, and at least doubled the chances of a successful attack upon England. But Philip's mind moved slowly and only on provocation. It took a year or two to satisfy him that Portugal was really his; not until 1583 was the fleet of the pretender Don Antonio destroyed in the Azores. The victor, Santa Cruz, then suggested an armada against England, but the English Catholics could not be brought into line with a Spanish invasion. The various attempts to square James VI. of Scotland had not been successful, and events in the Netherlands and in France disturbed Philip's calculations. But his purpose was now probably fixed. After the murder of William the Silent (1584) Elizabeth sided more openly with the Dutch; the Spanish ambassador Mendoza was expelled from England for his intrigues with Elizabeth's enemies (1586); and on the discovery of Babington's plot Elizabeth yielded to the demand of her parliament and her ministers for Mary's execution (1587); her death removed the only possible centre for a Catholic rebellion in case of a Spanish attack. It also removed Philip's last doubts; Mary had left him her claims to the English throne, and he might, now that she was out of his path, hope to treat England like Portugal. Drake's "singeing of Philip's beard" in Cadiz harbour in 1587 delayed the expedition for a year, and a storm again postponed it in the early summer of 1588. At length the armada sailed in July under the incompetent duke of Medina Sidonia; its object was to secure command of the narrow seas and facilitate the transport of Parma's army from the Netherlands to England. But Philip after his twenty years' experience in the Netherlands can hardly have hoped to conquer a bigger and richer country with scantier means and forces. He relied in fact upon a domestic explosion, and the armada was only to be the torch. This miscalculation made it a hopeless enterprise from the first. Scarcely an English Catholic would have raised a finger in Philip's favour; and when he could not subdue the two provinces of Holland and Zeeland, it is absurd to suppose that he could have simultaneously subdued them and England as well. English armies were not perhaps very efficient, but they were as good as the material with which William of Orange began his task. Philip, however, was never given the opportunity. His armada was severely handled in a week's fighting on its