The Goudi coup (Greek: κίνημα στο Γουδί, romanized: kinima sto Goudi) was a military coup d'état by a group of military officers that took place on the night of 28 August [O.S. 15 August] 1909, at the barracks in Goudi, located on the eastern outskirts of Athens, Greece. The coup was pivotal in modern Greek history, ending the old political system and ushering in a new period for Greece.
The coup occurred under simmering tensions in Greek society, which reeled under the effects of a lack of necessary reforms and financial troubles that had been exacerbated by the defeat in the Greco-Turkish War of 1897. Emulating the Young Turks, several junior army officers founded a secret society, the Military League. With Colonel Nikolaos Zorbas as their figurehead, on the night of 15 August, the Military League, having gathered together its troops in the Goudi barracks, issued a pronunciamiento to the government, demanding an immediate turnaround for the country and its armed forces.