Context : Carlos Romero Giménez, sometimes misspelled Jiménez, (Madrid, November 7, 1890 - Mexico City, September 11, 1978) was a Spanish soldier loyal to the Spanish Republic, and one of the most prominent figures in the Siege of Madrid during the Spanish Civil War. 
Subject : Carlos Romero Giménez 
Relation : conflict
In which war did Carlos Romero Giménez fought?