Eighty-five years ago this past week, April 26, 1937, was a market day in Guernica, Spain. It was a Monday, when farmers from the surrounding countryside would bring their crops into the town square to sell to residents and others who flowed in from surrounding towns in the autonomous Basque Country. The Spanish Civil War was raging at the time, pitting the Republican government against General Francisco Franco’s rebel Nationalist faction and fascist allies Germany and Italy. Guernica, with a population of some 5,000, had not been a center of combat, but it stood some 30 kilometers east of Bilbao,…