Battles & Wars › Between the wars › Spanish Civil War
Bombing of Guernica
April 26, 1937· Event· Europe
Well documentedSolid records, physical evidence or scientific consensus.
German and Italian aircraft bombed the Basque town of Guernica for Franco's Nationalists, destroying much of it and killing many civilians.
See it on the Battles & Wars map →What happened
On the afternoon of Monday, April 26, 1937, the usual market day, planes of Germany's Condor Legion, with Italian support, bombed Guernica in northern Spain for about three hours. The town, a symbol of Basque identity, lay just behind the front, near a bridge and roads used by retreating Republican forces. Explosive and incendiary bombs destroyed most of the town center. Nationalist propaganda first claimed retreating Basques had burned it themselves.
Why it matters
It became a world symbol of bombing civilians, above all through Pablo Picasso's painting Guernica, and foreshadowed the bombing of cities in World War II.
How we know
Reports by The Times journalist George Steer, who saw the ruins, Condor Legion records, survivor testimony, and Picasso's painting, now in Madrid's Reina Sofía museum.
Still debated
The death toll is disputed: Basque authorities claimed over 1,600, while modern research suggests roughly 150 to 300. Whether the town or the bridge was the main target is debated.
Connections (3)
▸Bombing of Guernica shocked the world during Spanish Civil WarWell documented
The connection
The raid came during Franco's campaign to take the Basque country in the north. Reported worldwide within days, it turned much foreign opinion against the Nationalists and their German allies, and Picasso painted Guernica for the Republic's pavilion at the 1937 Paris World's Fair. Militarily it changed little; Bilbao fell in June.
When and how
Guernica, Basque Country, April 26, 1937, during the Nationalist offensive in Biscay; George Steer's report ran in The Times and The New York Times on April 28.
How we know
Newspaper archives, diplomatic reports and Picasso's painting, finished in June 1937, show the immediate global reaction.
Debates and open questions
Franco's Spain long claimed Republicans burned the town themselves; Germany formally apologized only in 1997. How far the outcry affected foreign policy is debated.
▸Bombing of Guernica was an early demonstration of Air power and strategic bombingWell documented
The connection
Germany's Condor Legion used Spain to test aircraft and methods, and Guernica showed how explosive and incendiary bombs together could destroy a town. It seemed to confirm theorists' warnings that bombers could devastate cities and terrorize civilians, and it deepened fear of air attack in Britain and elsewhere before World War II.
When and how
Guernica, April 26, 1937; the Condor Legion's chief of staff, Wolfram von Richthofen, directed the operation.
How we know
Richthofen's war diary and Luftwaffe records show bombing methods tried in Spain; similar methods were later used on Warsaw and Rotterdam.
Debates and open questions
Whether Guernica was a deliberate terror test or a tactical strike on a bridge and roads that destroyed the town is debated.
▸Strategic bomber struck civilians in the Bombing of GuernicaWell documented
The connection
On April 26, 1937, German Condor Legion and Italian bombers, supporting Franco, attacked the Basque town of Guernica for about three hours. They were medium bombers, not true long-range ones, and the stated target was a bridge, but much of the town burned. Picasso's painting made it the symbol of bombing civilians, a preview of World War II.
When and how
Guernica (Gernika), Basque Country, Spain, April 26, 1937; the Condor Legion under Wolfram von Richthofen, and Italy's Aviazione Legionaria.
How we know
George Steer's eyewitness report in The Times, Richthofen's diary, Condor Legion records and survivor testimony. Franco's side at first denied the bombing.
Debates and open questions
Deaths are disputed, from about 150 to the Basque government's figure of over 1,600. Whether the aim was the bridge or terror is debated.