Durango, a town of 10,000 inhabitants, was a road and railway junction between
Bilbao and the front. By bombing the road and infrastructure in the town, the Republican forces would be prevented from sending reinforcements from Bilbao. It would also ensure that the Basque and Republican troops couldn't retreat in an orderly fashion in order to fight another day. Despite the importance of Durango as a transportation junction, the town had no air defences, and there were only a few Republican
fighter planes to be found in the Basque region. On 31 March, German and Italian transport planes modified to carry bombs (German
Ju 52 and Italian
Savoia-Marchetti SM.81) from the
Condor Legion and the
Aviazione Legionaria bombed the town in relays. Two churches were bombed during the celebration of mass, killing 14 nuns and the officiated priest. Furthermore,
Heinkel He 51 fighters strafed fleeing civilians. Altogether, around 250 civilians (Thomas: 248; Beevor: 250 and Preston: 258) died in the attack. ==Aftermath==