How have we learned about solders firsthand during civil war?

We have learned about soldiers during the Civil War through various firsthand accounts, including letters, diaries, and memoirs written by the soldiers themselves. These personal narratives provide insight into their experiences, emotions, and perspectives on battles, camp life, and the hardships they faced. Additionally, photographs and official records, such as military reports and orders, contribute to our understanding of soldiers' lives and the broader context of the war. Collectively, these sources paint a vivid picture of the challenges and realities of military service during this tumultuous period in American history.