As Chief of the "Comando Supremo", Cavallero worked closely with German Field Marshal Albert Kesselring; he had a rather conflicting relationship with Field Marshal Erwin Rommel, whose advance into Egypt after his success at the Battle of Gazala he opposed, advocating instead the planned invasion of Malta; his opinion was however discounted. Under Cavallero’s leadership, Italy’s military forces continued to perform poorly; nonetheless, he was promoted to Marshal of Italy in 1942 after the promotion of Rommel to Field Marshal (largely to prevent Rommel from out-ranking him). Despite having a good grasp on the problems inherent to the war in the Mediterranean that Italy had to fight, his acquiescence to Mussolini's views (for example his insistence on augmenting the Italian contingent fighting on the Eastern Front) led to a fatal dispersion of Italy's meager resources.