Battle of Alsasua

Battle context

The Battle of Alsasua took place in Navarre during the early phase of the First Carlist War, when Carlist forces under Tomás de Zumalacárregui were working to consolidate their position in the Basque and Navarrese countryside. Zumalacárregui's attack on a Liberal convoy moving between Vitoria-Gasteiz and Pamplona represented the kind of interdiction operation that characterized Carlist strategy in the region — disrupting Liberal communications and supply lines rather than contesting fixed positions. The engagement resulted in 300 Carlist casualties, indicating the Liberal convoy offered significant resistance despite being caught on the march. The outcome is not recorded, but the action reflects the contested nature of the road network linking Liberal-held urban centers in the north during this period of the war.