This publication presents the defense of the city of Valencia during the years 1936-1939 under two premises; whether Valencia was strategically bombed and which were the targets. The second premise is whether the city was efficiently organized to protect its civilians. The methodological proposal is based on the use of the classical parameters of the archaeological intervention, with the possibility of elaborating catalogs of goods, thematic, temporary, etc. Those derived in tools for urban planning, archaeological charts, and other documents. It also carries out a comparative analysis of the current legislative framework at national and regional level (Murcia, Valencia and Catalonia). A classification is made of the elements that make up the different heritages and their main characteristics. It Analyzes the documentation from 1936 to 1939 collected in the different archives: the Municipal of Valencia, the Diputacion, the Historical Military of Avila, the Intermediate Military of Valencia, the Military Library "Center of Cultures", the Hemeroteca Municipal and The Library of the City of Valencia. All this is done through extensive prospecting and GPS, with planimetric surveys of the localized remains and the digitalization of the entire planimetry of the time. A planimetric map of all shelters in the city is elaborated and the village of Puig. Moreover, a glossary of military terminology is added with the purpose of helping the reader, in addition to a daily list of the bombings that the city suffered during the years 1937 to 1939.