Benito Mussolini 14

 From the beginning, the war went badly for Italy, and Mussolini’s opportunistic hopes for a quick victory soon dissolved. France surrendered before there was an opportunity for even a token Italian victory, and Mussolini left for a meeting with Hitler, sadly aware, as Ciano put it, that his opinion had "only a consultative value." Indeed, from then on, Mussolini was obliged to face the fact that he was the junior partner in the Axis alliance. The Germans kept the details of most of their military plans concealed, presenting their allies with a fait accompli for fear that prior discussion would destroy surprise. And thus the Germans made such moves as the occupation of Romania and the later invasion of the Soviet Union without giving any advance notice to Mussolini.
It was to "pay back Hitler in his own coin," as Mussolini openly admitted, that he decided to attack Greece through Albania in 1940 without informing the Germans. The result was an extensive and ignominious defeat, and the Germans were unwillingly forced to extricate him from its consequences. The 1941 campaign to support the German invasion of the Soviet Union also failed disastrously and condemned thousands of ill-equipped Italian troops to a nightmarish winter retreat. Hitler had to come to his allies' aid once again in North Africa. After the Italian surrender in North Africa in 1943, the Germans began to take precautions against a likely Italian collapse. Mussolini had grossly exaggerated the extent of public support for his regime and the war. When the Western Allies successfully invaded Sicily in July 1943, it was obvious that collapse was imminent.