12th » French Wars of Religion: Henry III of France flees Paris after Henry of Guise enters the city and a Day of the Barricades known as spontaneous uprising occurs.
28th » The Spanish Armada, with 130 ships and 30,000 men, sets sail from Lisbon, Portugal, heading for the English Channel. (It will take until May 30 for all ships to leave port.)
30th » The last ship of the Spanish Armada sets sail from Lisbon heading for the English Channel.