Context: Sir : I got your letter and was glad to find you had not forgotten Jourdon , and that you wanted me to come back and live with you again , promising to do better for me than anybody else can . I have often felt uneasy about you . I thought the Yankees would have hung you long before this for harboring Rebs they found at your house . I suppose they never heard about your going to Col . Martin 's to kill the Union soldier that was left by his company in their stable .

Question: What might the term rebs refer to in this story ?
Options:
0. Rebs must refer to members of the rebel army during the World War 2 .
1. Rebs must refer to members of the rebel army during the American civil war .
2. Rebs must refer to members of the union army during the American civil war .
3. None of the above choices .
Answer: 1