 Complete the following phrase:  The most ambitious operation he carried out throughout 1938 was the offensive of the Ebro, a plan that grew from the previously mentioned tactical assumption developed in the Superior War School, that gave rise to the long running battles of the Ebro that developed from 25 July to 16 November 1938. In these battles the Republic gambled its international prestige, its endurance and the possibility of being able to give a favorable turn to the course of the war. In December 1938 he planned 