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BATTLE // January 1, 1937

Battle of Guadalajara

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Overview

The Battle of Guadalajara saw the victory of the Spanish Republican Army 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.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of Guadalajara resulted in a Republican victory over the Italian and Nationalist forces that had been attempting to encircle Madrid during the Spanish Civil War. The Nationalist effort at Guadalajara was spearheaded primarily by the Italian Corps of Volunteer Troops, and their defeat halted the encirclement operation. With 35,000 Nationalist troops against 20,000 Republican defenders — including International Brigades — the Republican forces nonetheless prevailed, inflicting roughly 3,000 Nationalist casualties against approximately 2,000 of their own. The outcome checked a significant threat to Madrid and undermined the strategic momentum of the encirclement campaign, demonstrating that combined Republican and International Brigade forces could hold against numerically superior Italian-backed Nationalist advances on the central front.

Tactics

The overview does not describe how the battle was fought in tactical terms.

Forces & casualties

Troop strength

  • Republican Spain20,000
    medium
  • Nationalist Spain35,000
    medium

Nationalist Spain fielded a 1.8 : 1 numerical advantage

Casualties

  • Republican Spain2,000
    medium10% loss rate
  • Nationalist Spain3,000
    medium9% loss rate

Commanders (12)

Republican Spain

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Related

6 sibling battles · 6 factions

Last verified May 2026
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