William of Orange was recognized as viceroy of Holland, Friesland and Utrecht.
The siege of Leiden between the rebels and the Spanish. 1574 The dikes were opened allowing a Dutch fleet to sail over the flood waters and rescue Leiden.
The Union of Utrecht brought together seven northern, Protestant provinces of the Netherlands against the Catholics. Known as the United Provinces, they become the foundation of the Dutch Republic. The Treaty of Utrecht was signed, marking the beginning of the Dutch Republic.