In 1787 Prussia invaded Holland to restore the Orangist stadtholderate against the increasingly rebellious Patriots, who sought to overthrow House of Orange-Nassau and establish a democratic republic. The direct cause of the invasion was the Arrest at Goejanverwellesluis, where Frederick William II's sister Wilhelmina of Prussia, also stadtholder William V of Orange's wife, was stopped by a band of Patriots who denied her passage to The Hague to reclaim her husband's position.