Returning north, In August and September 1937 Sperrle's legion assisted Franco's victory at the Battle of Santander with only 68 aircraft—none of the Brunete losses had been replaced. The Republican reportedly lost 70,000 men captured. For the remainder of September the German command focused on the Asturias Offensive which ended the War in the North. Sperrle lost 12 aircraft and 22 men killed, amounting to 17.5 percent of his strength. The attacks, which faced opposition from only 45 Republican aircraft were effective and imposed up to 10 percent losses on some Republican infantry formations. Republican commander Adolfo Prada later stated the bombing had buried entire units in rubble.