Answer:
The historian may use soldiers' journals, documents from armies and interviews with people who fought in war and civilians, photographs, among others.
Step-by-step explanation:
Primary source is a data that has not had any kind of analysis about it. This information can be from a document, company records, correspondence, among others. In other words, the documents acquired by the researcher are the primary source. These documents can be found in public archives, private, statistical yearbooks. They are still considered primary sources: photographs, recordings of interviews, radio or television programs, drawings, paintings, music, art objects.