Euzko Gudarostea (modern spelling: Eusko Gudarostea, "Basque army") was the name of the army commanded by the government of the Basque Autonomous Community 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. It fought the troops of Francisco Franco during 1936 and 1937. It surrendered to the Italian Corpo Truppe Volontarie at Santoña (province of Cantabria), while the rest of the Republican army kept fighting until 1939. This event is referred as the Treason of Santoña by some Spanish leftists.
The members of the Basque clandestine armed group ETA consider themselves gudariak continuing the struggle of the Civil War Basque soldiers. This is contested by those war veterans that support PNV, PSOE or PCE.
The Gudari Eguna ("warrior day") is thus celebrated separately: