The first of two volumes on the Axis campaigns in the Balkans, exploring Mussolini's fateful decision to move against Greece in October 1940, when the Greek President Metaxas rejected the Italian ultimatum with a famous 'Oxi' ('No'). In the wake of Italy's rapid annexation of Albania in April 1940, Mussolini's decision to attack Greece in October that year is widely acknowledged as a fatal mistake, leading to a domestic crisis and to the collapse of Italy's reputation as a military power (re-emphasized by the Italian defeat in North Africa in December 1940). The Italian assault on Greece came to a stalemate in less than a fortnight, and was followed a week later by a Greek counter-offensive that broke through the Italian defences before advancing into Albania, forcing the Italian forces to withdraw north before grinding to a half in January 1941 due to logistical issues. Eventually, the Italians took advantage of this brief hiatus to reorganize and prepare a counteroffensive, the failure of which marked the end of the first stage of the Axis Balkan campaign. This book offers a detailed overview of the Italian and Greek armies, their fighting power, and the terrain in which they fought. Complemented by rarely seen images and full colour illustrations, it shows how expectations of an easy Italian victory quickly turned into one of Mussolini's greatest blunders.