It killed an estimate of 250 people and destroyed most of the city .
It was perpetrated on March 31 , 1937 , by the Italian Air Forces in a three - raid pattern , almost exact to the one observed in Guernica .
Guernica killed an estimate of 250 people and destroyed most of the city .
It was perpetrated on March 31 , 1937 , by the Italian Air Forces in a three - raid pattern , almost exact to the one observed in Guernica .