Union of Arras

Map after Treaty of Utrecht (charter of independence) in 1579, rebel territories in red (independentistas), and its annexations during the first year in light brown. In clear green the territories of the Brussels Union, territories that had asked the king of Spain to remove the thirds of Flanders after the mutiny of the thirds and the sacking of Antwerp (neutral, recognizing the royal authority). In green-turquoise territories taken by Spain initially. In blue the Union of Arras, ally of Spain. In dark brown the Bishopric of Liège, ally of Spain.

The union of Arras was an agreement signed on January 5, 1579 in the city of Arras whereby some southern provinces of the Netherlands recognized the sovereignty of Philip II in the framework of the Eighty Years' War. Some of the territories that formed these provinces have been part of France since 1659.

The points agreed in the union were as follows:

The signatories of the union were:

The provinces of Namur, Luxembourg and the Duchy of Limburg, despite being supportive of the Arras union, did not sign the agreement.

The response of the rebellious provinces was the Utrecht union signed a few days later.

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