Whilst the next major campaign – Madrid or Barcelona – was discussed, the Condor Legion was moved to Soria and began a week of strikes against Republican airfields, halted by the Republican advance on Teruel and the ensuing Battle of Teruel. Both the Legion's land and air forces were used, and the Legion moved to Bronchales. Poor weather resulted in few flights, and the town fell to Republican forces on 6 January. Up to 100 sorties a day were launched during the Nationalist's counter-offensive through the Alfambra valley. The Junkers Ju 87A was used for the first time on the advance on Teruel, which was retaken on 22 February. The continued Nationalist offensive on Aragon in April–June 1937, including the Battle of Belchite, involved bombing raids and the use of the Legion's ground forces. The Legion was switched to focus in the north, towards the Segre river, before moving south again following Nationalist successes. The Legion moved its main headquarters to Benicarló; single-engined planes operated from airfields nearby, and twin-engined planes from Zaragoza. Hitler's words to his colleagues belied a change in attitude about the war in Germany – that a quick victory in the war was not desirable, a mere continuation of the war would be preferable. German policy would be to prevent a Republican defeat. However, casualties were beginning to mount for the Legion and, combined with a resurgence in Republican air activity, the Nationalist advance stalled. This was, perhaps, because of the reluctance of commanders in Germany to supply reinforcements, with the Czechoslovakia crisis mounting. Arguments over the bill to the Germans – now rising at 10 million Reichmarks a month – continued, unresolved. The Legion's materiel had been exhausted.