The Siege of Maastricht was one of the key elements in King Louis XIV's plans to attack the Netherlands, in order to revenge the humiliating conditions enforced on him by the Triple Alliance when he tried to fully conquer the Spanish Netherlands. After making a feint for Ghent and Brussels, Louis marched his army past Maastricht, a condominium of the United Provinces and the Bishopric of Liège, in May 1672, not bothering to take the fortress. In 1673, when his supply lines became threatened he decided to capture the city; the siege began on June 11.