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 .
This is considered the clearest precedent for Guernica .
Guernica was perpetrated on March 31 , 1937 , by the Italian Air Forces in a three - raid pattern , almost exact to the one observed in Guernica .
This is considered the clearest precedent for Guernica .