The Battle of Falmagne (French: Bataille de Falmagne, Dutch: Slag bij Falmagne) occurred between the Holy Roman Empire and the United Belgian States on 22 September 1790.

[1][2] A volunteer force of 5,000 Belgian revolutionaries with four cannons, led by General Koehler, crossed the river Maas at Moniat on 22 September 1790 to attack the heights of Anseremme and Falmagne.

The Belgian troops briefly captured the Anseremme heights and took possession of several enemy cannons.

[2] When Austrian cavalry troops reinforced the outpost and two of the Belgian powder carts exploded they were soon forced back over the Maas river.

On the southern front the Belgian troops captured three cannons and took 30 enemy troops captive but soon fell into disarray and also retreated across the river.