I'm not entirely sure specifically what the 'hostiles 2017 real story' is about as it's not a widely known common term. It could potentially be related to a movie called 'Hostiles' released in 2017. If so, it's a story about a U.S. Army captain who is ordered to escort a dying Cheyenne war chief and his family back to tribal lands in the 1890s, exploring themes of hatred, forgiveness, and the relationship between different cultures during that era.
The movie 'Hostiles' has some roots in real history, but it's not a completely factual account. It blends real events with creative storytelling to create a compelling cinematic experience.