Final answer:
Appeasement during the Spanish Civil War involved Britain and France attempting to avoid further conflict by acquiescing to the actions of Germany and Italy, who were supporting General Francisco Franco's fascist uprising in Spain.
Step-by-step explanation:
The policy of appeasement during the Spanish Civil War refers to the actions of European powers, particularly Britain and France, attempting to satisfy the demands of aggressive powers like Germany and Italy to avoid further conflict. This policy was evident in their response to the Spanish Civil War where, despite an official stance of non-intervention, Germany and Italy provided substantial support to the Nationalist forces led by General Francisco Franco. Franco was seeking to overthrow the Republican government and establish a fascist regime, with claims that Spain was under threat from a so-called Jewish-Bolshevik-Masonic conspiracy. The civil war, which caused up to 500,000 casualties, allowed Germany and Italy to test their military capabilities before the onset of World War II.