Battle of Guadalajara
Battle of Guadalajara
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Battle of Guadalajara

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Battle of Guadalajara

The Battle of Guadalajara (March 8–23, 1937) saw the victory of the Spanish Republican Army (Ejército Popular Republicano, or EPR) and of the International Brigades over the Italian and Nationalist forces attempting to encircle Madrid during the Spanish Civil War. The Nationalist forces involved in the Battle of Guadalajara were primarily the Italian Corps of Volunteer Troops (Corpo Truppe Volontarie, or CTV).

The battle opened with an Italian offensive on 8 March. This offensive was halted by 11 March. Between 12 and 14 March, renewed Italian attacks were supported by Spanish Nationalist units. These were halted too. On 15 March, a counter-offensive of the Republicans was prepared; it was successfully launched between 18 and 23 March. The battle was decided by the superiority of Soviet armoured vehicles over Italian ones.

The combined Italian and Nationalist losses are estimated to have been 17,400 killed, wounded and captured, compared to 6,258 for the Republicans. As a result of a re-organisation and new leadership, the CTV improved its combat record after Guadalajara, which was the force's only defeat of the war.

After the collapse of the third offensive on Madrid, Spanish Nationalist General Francisco Franco decided to continue with a fourth offensive aimed at closing the pincer around the capital. The Nationalist forces, after a defeat at the Battle of Jarama, were exhausted and could not create the necessary momentum to carry the operation through. However, the Italians were optimistic after the capture of Málaga, and it was thought that the Italian forces could score an easy victory owing to the heavy losses sustained by the People's Republican Army at Jarama. Italian dictator Benito Mussolini endorsed the operation and committed Italian units to it.

The Italian commander, General Mario Roatta, planned to surround the defences of Madrid from the north-east. After joining the Spanish Nationalist corps "Madrid" on the Jarama River, they would begin the assault on Madrid. The Italian forces would execute the main attack. The Spanish division "Soria" was present to secure the operation, but played no part in the first five days of fighting. The main attack began in the 25 km-wide pass at Guadalajara-Alcalá de Henares. This region was well suited for an advance, as there were five roads of high quality running through it. Three other roads in the area led to Guadalajara, allowing for the possibility of capturing this town as well. The Nationalist forces had 35,000 soldiers, 222 artillery pieces, 108 L3/33 tankettes and L3/35 tankettes, 32 armoured cars, 3,685 motor vehicles, and 60 Fiat CR.32 fighter planes. The Italian tankettes and armoured cars were organized as the "Tank and Armoured Cars Group" (Agrupación de carros de asalto y autos blindados). The Italian aircraft were organized into the "Legionary Air Force" (Aviazione Legionaria).

The Republican presence in the Guadalajara region consisted only of the 12th Division of the People's Republican Army under Colonel Lacalle. He had under his command 10,000 soldiers with 5,900 rifles, 85 machine guns, and 15 artillery pieces. One company of T-26 light tanks were also sent to the area. No defensive works had been constructed in the Guadalajara region, because it was regarded as a peaceful part of the front. The People's Republican Army staff was sure that the next Fascist offensive would come from the south.

After 30 minutes' artillery fire and air raids on the Republican positions, the Italians began advancing towards the 50th Republican brigade. Led by tankettes, they broke through the Republican line. Their assault then slowed, mainly because fog and sleet had reduced visibility down to 100 metres (110 yards) in places. The Italians captured 10 to 12 km of terrain, including the towns of Mirabueno, Alaminos and Castejon. Falling back, the Republican commander requested infantry reinforcements and the company of tanks.

The Nationalists continued their assault on Republican positions. The main attack was carried out with tanks but again bogged down from poor performance and low visibility. The Republican 50th Brigade escaped without a fight. At about noon, the Italian advance was suddenly turned back by battalions of the XI International Brigade (battalions involved were initially the Edgar André Battalion, Thälmann Battalion and Commune de Paris Battalion – with soldiers mainly from Germany, France, and the Balkan countries). The Italians on the Nationalist side had taken another 15 to 18 km and the towns of Almadrones, Cogollor, and Masegoso. In the evening, the first formations of Italian troops reached the suburb of Brihuega, where they halted to await a wider breach in the Republican lines. This break in momentum, though incompatible with the blitzkrieg tactics they were nominally following, was under the circumstances necessary to allow the soldiers to rest.

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