How does the author use foreshadowing in War and Remembrance?

Victor "Pug" Henry prepares to take over command of the U.S.S. Northampton. He reads over a letter from his wife, Rhoda. They have apparently had marital problems but Rhoda now says she wants to make things right. She also asks Pug to see if he can find out anything about Natalie, their daughter-in-law, who has not been heard from in several days. Natalie is Jewish and Rhoda is concerned for her and her baby son, Louis. Pug shares lunch one last time with his other son, Warren, his wife Janice and their baby, Little Victor, at their home near Pearl Harbor before he returns to his ship. This foreshadows the family saga that is about to unfold.