The Brabant Revolution or Brabantine Revolution, sometimes referred to as the Belgian Revolution of 1789–90 in older writing, was an armed insurrection that occurred in the Austrian Netherlands between October 1789 and December 1790. The revolution, which occurred at the same time as revolutions in France and Liège, led to the brief overthrow of Habsburg rule and the proclamation of a short-lived polity, the United Belgian States.
The revolution was the product of opposition which emerged to the liberal reforms of Emperor Joseph II in the 1780s. These were perceived as an attack on the Catholic Church and the traditional institutions in the Austrian Netherlands. Resistance, focused in the autonomous and wealthy Estates of Brabant and Flanders, grew. In the aftermath of rioting and disruption in 1787, known as the Small Revolution, many dissidents took refuge in the neighboring Dutch Republic where they formed a rebel army. Soon after the outbreak of the French and Liège revolutions, this émigré army crossed into the Austrian Netherlands and decisively defeated the Austrians at the Battle of Turnhout in October 1789.