The Patriottentijd (pɑtriˈotə(n)tɛit; "Time of the Patriots") was a period of political instability in the Dutch Republic between approximately 1780 and 1787. Its name derives from the Patriots (Patriotten) faction who opposed the rule of the stadtholder, William V, Prince of Orange, and his supporters who were known as Orangists (Orangisten).
In 1781 one of the leaders of the Patriots, Joan Derk van der Capellen tot den Pol, influenced by the reformer Richard Price and the dissenter Joseph Priestley, anonymously published a pamphlet, entitled Aan het Volk van Nederland ("To the People of the Netherlands"), in which he advocated, like Andrew Fletcher (patriot), the formation of civic militias on the Scottish, Swiss and American model to help restore the republican constitution. Such militias were subsequently organised in many localities and formed, together with Patriot political clubs, the core of the Patriot movement. From 1785 on, the Patriots managed to gain power in a number of Dutch cities, where they replaced the old system of co-option of regenten with a system of democratically elected representatives. This enabled them to replace the representatives of these cities in the States of several provinces, gaining Patriot majorities in the States of Holland, Groningen and Utrecht, and frequently also in the States General. This helped to emasculate the stadtholder's power as he was deprived of his command over a large part of the Dutch States Army. A low-key civil war ensued that resulted in a military stalemate, until in September–October 1787 the Patriots were defeated by a Prussian army and many were forced into exile.
The term Patriot (from Greek πατριώτης, "fellow countryman") had previously been used in the 17th century by anti-Orangists, but when French troops invaded the Republic in 1747, "Patriots" demanded the return of the Orange stadtholderate, which ended the Second Stadtholderless Period (1702–1747). From 1756 onward, however, Dutch States Party regenten once again began styling themselves "Patriots".