 Complete the following phrase:  In 1785, stadtholder William V fled his palace in the west of the country for Nijmegen in the east, as the States of Holland were not willing to send their troops to fight the Patriots. In May 1787, the stadholders troops were defeated by the militia of Utrecht near Vreeswijk. When Princess Wilhelmina was stopped by patriot militia near Goejanverwellesluis on June 28, 1787, she applied to her brother Frederick William II of Prussia for help. On September 13 a Prussian army of 20,000 men under the command of Duke of Brunswick 