Spanish Civil War KS3 history — Franco, the International Brigades and Guernica

Between 1936 and 1939, Spain tore itself apart in a civil war that drew in Hitler's Germany, Mussolini's Italy and thousands of foreign volunteers who believed the future of democracy itself was at stake. The Spanish Civil War was, in a real sense, the first battle of the Second World War.

What caused the Spanish Civil War?

Spain in the 1930s was under severe political stress. The Second Republic, established in 1931 after the fall of the monarchy, had attempted ambitious reforms: land redistribution, separation of church and state, regional autonomy for Catalonia and the Basque Country. These changes alarmed the traditional power centres of Spanish society — the army, the Catholic Church, large landowners — while radical left-wing groups demanded even faster change.

The February 1936 general election produced a narrow victory for a left-wing coalition (the Popular Front) — a result the conservative right refused to accept as legitimate. On 17–18 July 1936, a group of generals launched a military coup. They expected a quick takeover. Instead, resistance from trade unions, leftist militias and loyal army units in key cities turned the coup into a prolonged civil war.

The two sides are commonly called:

• Republicans (or Loyalists): supporters of the elected government, including socialists, communists, anarchists, liberals, and regional nationalists in Catalonia and the Basque Country.
• Nationalists: supporters of the military coup, including conservatives, monarchists, the Catholic Church hierarchy, the fascist Falange movement, and large landowners.

How did foreign powers intervene?

The Spanish Civil War quickly became an international conflict. The division between the sides mapped onto the broader ideological struggle gripping Europe in the 1930s.

The Non-Intervention Committee, set up by Britain and France, was intended to stop the war from spreading. In practice it was largely honoured by neither Germany nor Italy, while being more strictly observed by democracies — meaning Republican Spain received less foreign military support than the Nationalists, despite the USSR's assistance.

Who were the International Brigades?

One of the war's most remarkable features was the spontaneous enlistment of roughly 35,000–40,000 foreign volunteers — drawn from over 50 countries — to fight on the Republican side. They called themselves the International Brigades.

The volunteers included writers, intellectuals and workers who believed that defeating fascism in Spain would stop its spread across Europe. From Britain, around 2,500 joined; approximately a third were killed. Famous British volunteers included the poet John Cornford, killed at 21. George Orwell, though not a Brigade member, fought with an anarchist militia (the POUM) and wrote his memoir Homage to Catalonia about the experience.

The Brigades were not a simple story of heroism. The Communist Party (backed by the USSR) exercised considerable control over recruitment and political direction, and there were internal conflicts — including the brutal suppression of anarchist and Trotskyist groups in Barcelona in May 1937 — that Orwell documented with discomfort. The Republic was not a unified movement, and understanding that internal complexity is necessary for an honest account.

What was the bombing of Guernica?

On 26 April 1937, the German Condor Legion and the Italian Aviazione Legionaria carried out a sustained aerial bombardment of Guernica, a Basque market town with no significant military installations, on a busy Monday market day. Casualty figures are disputed — estimates range from around 150 to over 1,600 — but the attack became the most notorious act of aerial warfare against civilians up to that date.

Pablo Picasso, living in Paris, was commissioned by the Spanish Republican government to produce a mural for the Paris World Exhibition. He responded with Guernica (1937) — a large monochrome painting of anguished figures, a screaming horse, a wounded bull, a dead child, and fractured bodies — which became one of the most powerful anti-war statements in the history of art. It is now in the Reina Sofía museum in Madrid.

The bombing of Guernica anticipated what aerial warfare would mean for civilians in the Second World War. Germany and Italy were testing weapons, tactics and the political reaction to civilian bombing. The lesson they drew was that democracies would protest loudly but not intervene.

How did the war end and what followed?

By early 1939, Nationalist forces controlled most of Spain. Barcelona fell in January 1939; Madrid surrendered on 28 March. Franco declared victory on 1 April 1939 — five months before Hitler invaded Poland to begin the Second World War.

Franco established a dictatorship that would last until his death in 1975. An estimated 200,000 people died in direct fighting; many more died of disease and starvation. After the Nationalist victory, perhaps 400,000 Republicans fled into exile — mainly into France, where many were interned in camps. Around 50,000 Republicans were executed in post-war repression.

Spain's democratic transition came only after Franco's death, in the form of the 1978 constitution. The Civil War remained a deeply sensitive subject in Spanish public life for decades.

Frequently asked questions

Why is the Spanish Civil War called a "rehearsal" for the Second World War?

Germany and Italy used the Spanish Civil War to test military equipment, tactics and doctrine that would be deployed in the wider European war. German pilots of the Condor Legion practised close air support and area bombing; Messerschmitt fighters were evaluated in combat; the effectiveness of terror bombing against civilian populations was observed. Many historians argue that the failure of Britain and France to intervene against Nazi and Italian military action in Spain encouraged Hitler's belief that democracies would not fight — a lesson he applied in his subsequent aggressions.

What was the Non-Intervention Committee?

The Non-Intervention Committee was set up in September 1936 by Britain and France with the aim of preventing foreign military involvement from escalating the Spanish conflict into a wider European war. Twenty-seven countries joined, including Germany, Italy and the Soviet Union. In practice Germany and Italy largely ignored its restrictions while continuing to supply the Nationalists. Critics argued the committee primarily harmed the Republic by restricting its access to weapons while Nationalist forces received extensive foreign support.

Who was Francisco Franco?

Francisco Franco was the general who led the Nationalist military uprising in July 1936 and, after defeating rival Nationalist generals, became undisputed leader ("Caudillo") of Nationalist Spain by 1938. After winning the Civil War he ruled Spain as a dictator from 1939 until his death in November 1975. His regime was authoritarian and repressive, particularly in its early years when thousands of Republicans were executed, but it evolved: Spain industrialised, joined the United Nations (1955), and opened to tourism from the 1960s onwards. Franco's legacy remains deeply contested in Spain today.

What happened to Republican refugees from Spain?

Around 400,000–500,000 Republican civilians and soldiers fled Spain in early 1939, mainly into France. Many were interned in improvised camps along the Mediterranean coast in appalling conditions. Some eventually settled in France, Mexico and other countries; Mexico admitted around 25,000 Spanish refugees under President Lázaro Cárdenas, including intellectuals and artists who made significant contributions to Mexican cultural life. Many hoped to return to Spain after a short exile; most did not do so until Franco's death or later.

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