On October13, 1920, the Commander of the West Front, Ali Fuat Pasha, appealed to the General Staff with an offer to rescue Gediz by attacking the 13th Greek Faction in Gediz, and Gediz Attack was realized on 24October with the acceptance of the proposal. Though Gediz was saved from Greeks and Turkish powers secured Gediz at the end of this attack, the success of the battle is a contradictive issue. However, the most important feature of Gediz Attack is its military and political consequences beyond its succees or failure. On one hand, this attack revealed the tension and confidence crisis between nationalist forces and regular army troops and on other hand it also revealed the fact that Western Front Commander was unable to have an effect on nationalist forces in the region. Thus, while efforts for abolishing nationalist forces and establishing regular army was accelerated after Gediz Attack, Ali Fuat Pasha was dismissed from the commandership of Western Front and appointed as the ambassador in Moscow. In this article, the preparation and implementation of Gediz Attack will be investigated based on documentary evidence. Therefore, it is aimed to find the answer to the question whether the attack was successful or not and enlighten the causes of developments emerged after the attack.