The Adventures of the U-202

The story of an Imperial German U-boat in World War I as told by its captain. Highly entertaining and complimentary of the sailors on both sides of the conflict.
During these early U-boat cruises, the crews were highly motivated to destroy enemy shipping but not personnel, unless the mission demanded it. Hence, enemy crews were given warning, time to abandon ship, food and water as necessary to survivors, and even a tow toward home, as long as the U-boat didn't come under attack in the process.