Princess Wilhelmina, when stopped by patriot militia near Goejanverwellesluis on June 28, 1787, had applied to her brother Frederick William II of Prussia for help.

On September 13 a Prussian army of twenty thousand men under the command of the Duke of Brunswick crosses the border.

The fortress of Vianen is deserted, ...

...the city of Utrecht opens its gates.

Preparations for defense are made at the fortress of Woerden, but there is no actual resistance when the Prussians arrive.

Several houses of patriot regents in Amsterdam are plundered by a mob.

The stadholder returns to Gravenhage and Amsterdam, the last city to hold out, surrenders on October 10.

The Patriots continue urging citizens to resist the government by distributing pamphlets, creating "Patriot Clubs" and holding public demonstrations.

The government responds by pillaging those towns where the opposition is concentrated.

Most Patriots go into exile in France, while Holland's own "Ancien Régime" strengthens its grip on Dutch government chiefly through the Orangist Grand Pensionary Laurens Pieter van de Spiegel.