In total, some 30,000 young people were called up, coming from all over the national territory on the Republican side: Murcia, Catalonia, Old Castilla and Valencia, among others. They were under the command of Lluís Companys, among whom would be counted future personalities such as Jesús Blasco. First, they had to cover auxiliary tasks, but on July 25, 1938, they were already participating in the Republican offensive of the Battle of the Ebro, the vast majority being minors, reaching, some as children, only 14 years old.