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The First Battle of the Corunna Road took place between 29 November and 3 December 1936 during the Spanish Civil War. The Nationalists tried to isolate Madrid from the west, cutting the Corunna Road, but the Republican army repelled the attack.
After the failure to take Madrid in November 1936 and the failure to reduce the morale of the city's population through aerial bombing, Franco decided to encircle the city from the north-west in order to cut off water and electricity supplies from the Sierra de Guadarrama. Franco's Nationalists, led by Varela, concentrated a force of 3,000 men supported by heavy artillery including Ju 52 bombers. The defending Republican army had one brigade.