La Forestal massacre was the mass killing, torture, rape and burning of houses of workers aligned with the anarcho-syndicalist union FORA by private police forces and the paramilitary nationalist organization Argentine Patriotic League in 1921 in several towns of the north of the Santa Fe province of Argentina.
In 1906, with very limited state regulation, La Forestal took control of more than 5 million acres of land, obtaining one of the largest tannin reserves in the world and started production operations.
The extraction of tannin by the company caused environmental problems in the local habitat including floods due to deforestation and the extinction or endangerment of wildlife species.
[2] The company created a repressive body named Gendarmería Volante with the permission of the local authorities and in December 1920 closed some factories and fired workers.
The company responded by sending the Gendarmería Volante which along with the paramilitary nationalist Argentine Patriotic League attacked the workers and their families killing about 600 of them.