Spanish Civil War: Llanes falls to the Nationalists following a one-day siege.

Llanes (the Concejo de Llanes, Conceyu de Llanes in Asturian language) is a municipality of the province of Asturias, in northern Spain. Stretching for about 30 km along the coast at the extreme east of the province, Llanes is bounded to the south by the high ridge of the limestone Sierra del Cuera, which rises to over 1,100 m. The region is part of the Costa Verde (Green Coast) of Spain, which is known for its spectacular coastal scenery, with 32 white sand beaches, and mountains covered with a deep green mantle. Llanes lies to the north of the Picos de Europa, a mountain range whose geology is almost entirely of limestone karst.

Most of the inhabitants of the district live on the coastal plain, on which the largest town is Llanes itself, with a population of about 4,000 out of the total for the district of about 13,000. The folklore, food, and fiestas of the region are famous for their colour and history.

The Spanish Civil War (Spanish: Guerra Civil Española) was a civil war in Spain fought from 1936 to 1939. Republicans loyal to the left-leaning Popular Front government of the unstable Second Spanish Republic, in alliance with both communist and syndicalist anarchists, fought against an insurrection by the Nationalists, an alliance of Falangists, monarchists, conservatives and traditionalists, led by a military junta among whom General Francisco Franco quickly achieved a preponderant role. Due to the international political climate at the time, the war had many facets and was variously viewed as class struggle, a religious struggle, a struggle between dictatorship and republican democracy, between revolution and counterrevolution, and between fascism and communism. According to Claude Bowers, U.S. ambassador to Spain during the war, it was the "dress rehearsal" for World War II. The Nationalists won the war, which ended in early 1939, and ruled Spain until Franco's death in November 1975.

The war began after a pronunciamiento (a declaration of military opposition, of revolt) against the Republican government by a group of generals of the Spanish Republican Armed Forces, with General Emilio Mola as the primary planner and leader and having General José Sanjurjo as a figurehead. The government at the time was a coalition of Republicans, supported in the Cortes by communist and socialist parties, under the leadership of centre-left President Manuel Azaña. The Nationalist group was supported by a number of conservative groups, including CEDA, monarchists, including both the opposing Alfonsists and the religious conservative Carlists, and the Falange Española de las JONS, a fascist political party. After the deaths of Sanjurjo, Emilio Mola and Manuel Goded Llopis, Franco emerged as the remaining leader of the Nationalist side.

The coup was supported by military units in Morocco, Pamplona, Burgos, Zaragoza, Valladolid, Cádiz, Córdoba, and Seville. However, rebelling units in almost all important cities—such as Madrid, Barcelona, Valencia, Bilbao, and Málaga—did not gain control, and those cities remained under the control of the government. This left Spain militarily and politically divided. The Nationalists and the Republican government fought for control of the country. The Nationalist forces received munitions, soldiers, and air support from Fascist Italy and Nazi Germany, while the Republican side received support from the Soviet Union and Mexico. Other countries, such as the United Kingdom, the French Third Republic, and the United States, continued to recognise the Republican government but followed an official policy of non-intervention. Despite this policy, tens of thousands of citizens from non-interventionist countries directly participated in the conflict. They fought mostly in the pro-Republican International Brigades, which also included several thousand exiles from pro-Nationalist regimes.

The Nationalists advanced from their strongholds in the south and west, capturing most of Spain's northern coastline in 1937. They also besieged Madrid and the area to its south and west for much of the war. After much of Catalonia was captured in 1938 and 1939, and Madrid cut off from Barcelona, the Republican military position became hopeless. Following the fall without resistance of Barcelona in January 1939, the Francoist regime was recognised by France and the United Kingdom in February 1939. On 5 March 1939, Colonel Segismundo Casado led a military coup against the Republican government. Following internal conflict between Republican factions in Madrid in the same month, Franco entered the capital and declared victory on 1 April 1939. Hundreds of thousands of Spaniards fled to refugee camps in southern France. Those associated with the losing Republicans who stayed were persecuted by the victorious Nationalists. Franco established a dictatorship in which all right-wing parties were fused into the structure of the Franco regime.The war became notable for the passion and political division it inspired and for the many atrocities that occurred, on both sides. Organised purges occurred in territory captured by Franco's forces so they could consolidate their future regime. Mass executions on a lesser scale also took place in areas controlled by the Republicans, with the participation of local authorities varying from location to location.