August to September: Roatta's replacement, General Ettore Bastico, commanded the CTV forces including the Division XXIII di Marzo, formed from the XXIII de Marzo Group. The CTV broke the Republicans' lines near Soncillo, captured a key pass, the Puerto del Escudo, and penetrated deep into the Republican rear during the Battle of Santander, resulting in a decisive victory for the Nationalists. After that they were transferred to the Aragón Front. Some CTV forces may have been involved in the Battle of El Mazuco, but details are unconfirmed.