Answer:
Finding one's way out of difficult situations takes cunning and bravery.
Explanation:
According to the book Nurse and Spy in the Union Army by Emma Edmonds, the central idea therein is that it is difficult to find one's way out of difficult situations as it takes cunning and bravery.
From the book, real-life events that occurred at a military camp during the Civil War are explained and the reader can infer that war is never a pretty sight because the losses are almost incalculable, both in human life and properties.
