Another possible 'Greyhound real story' could be about Greyhound dogs. Greyhounds are known for their speed and grace. There could be stories about their racing careers. Some real stories might involve the rescue and rehabilitation of Greyhounds after their racing days are over. These dogs are often retired early due to various reasons, and there are organizations that work to find them new homes, giving them a second chance at a happy life.
Greyhound is based on true happenings. It gives a fictionalized account of real historical occurrences related to naval warfare during that time period. While it may not be a 100% accurate retelling, it captures the essence of the events.
The movie Greyhound is not based on a true story. It takes elements from the setting of World War II but creates a fictional narrative for entertainment purposes. However, it does aim to capture the intensity and challenges of naval warfare during that time.