I don't think 'Jackals' is a true story. Usually, such titles are works of imagination or drawn from common themes and tropes rather than being rooted in reality.
The story behind jackals could involve their survival strategies, social structures within their packs, and their adaptability to various environments. They are known for their cunning and ability to find food sources in challenging circumstances.
I'm not entirely sure specifically what 'jackals 2017 based on true story' is about as there could be many things with that name. It might be a movie, a book or some other form of media. If it's a movie, it could be about real - life events that happened in 2017 and involve 'jackals' in some symbolic or literal sense, perhaps related to human behavior or events in nature.