The Condor Legion also took part in the Battle of Brunete. The Legion was sent from the north to reinforce the broken line. There were repeated raids on Spanish Republican Army armoured vehicles and later defensive positions by both bombers and fighters based at Salamanca. Spanish Republican Air Force aircraft were ineffective, despite Nationalist fears, compared with German aircraft. The Legion lost eight aircraft, but claimed 18 victories. German tactics were also improved with the experience of Brunete, particularly the "en masse" use of tanks by the Nationalists.