Portal:Anarchism/Anniversaries/September/September 30
- 1909 – The first notice of an Industrial Workers of the World (IWW) free speech fight appears in the "Industrial Worker", appealing to all members to join the struggle in Missoula, Montana
- 1918 – Ukrainian insurgents, led by Nestor Makhno and Fedir Shchus, defeat the Austro-Hungarian Army at the battle of Dibrivka.