The Isaac Puente battalion (Batallón Isaac Puente) was a battalion of the Confederación Nacional del Trabajo

Confederación Nacional del Trabajo

The Confederación Nacional del Trabajo is a Spanish confederation of anarcho-syndicalist labor unions affiliated with the International Workers Association . When working with the latter group it is also known as CNT-AIT...

 (CNT) of the Basque Country

Basque Country (autonomous community)

The Basque Country is an autonomous community of northern Spain. It includes the Basque provinces of Álava, Biscay and Gipuzkoa, also called Historical Territories....

 which was active during the Spanish Civil War

Spanish Civil War

The Spanish Civil WarAlso known as The Crusade among Nationalists, the Fourth Carlist War among Carlists, and The Rebellion or Uprising among Republicans. was a major conflict fought in Spain from 17 July 1936 to 1 April 1939...

 from September 1936 to October 1937. It was named after Isaac Puente

Isaac Puente

Isaac Puente Amestoy was a Basque physician and Spanish anarchist who adhered to anarcho-naturism, active in the Confederación Nacional del Trabajo...

 and was nº 3 of the Milicias Antifascistas de la CNT and nº 11 of the Euzko Gudarostea

Euzko Gudarostea

Euzko Gudarostea was the name of the army commanded by the Basque Government during the Spanish civil war. It was formed by Basque nationalists, socialists and communists under the direction of lendakari José Antonio Aguirre and coordinating with the army of the Second Spanish Republic...

. The battalion participated in the Villarreal Offensive

Villarreal Offensive

The Villarreal Offensive was an offensive of the Spanish Civil War which lasted from 30 November to 24 December 1936. Eusko Gudarostea's 4300 men fought 600 men of the insurgent forces....

, the Vizcaya Campaign, the Battle of Santander

Battle of Santander

The Battle of Santander was fought over the summer of 1937 in the War in the North campaign in the Spanish Civil War. Santander's fall on September 1 assured the Nationalist conquest of the province of Santander and marked the last stand of the Republic's "Army of the North," which was destroyed...

, the Asturias Campaign and the Battle of El Mazuco

Battle of El Mazuco

The Battle of El Mazuco was fought between 6 and 22 September 1937, between the Republican and Nationalist armies during the Spanish Civil War as a part of the War in the North campaign. The Republican defence of El Mazuco and the surrounding mountains halted the Nationalist advance into eastern...

.