Q: Generate a correct and concise answer for the question based on the words in the context.
Context : Carlos Romero Gimenez, sometimes misspelled Jimenez, (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.
Question : In which war did Carlos Romero Gimenez fought?
A:
Spanish Civil War