The military experiment is crucial as it turned him into Deathstroke. Then there are his contracts as a mercenary. These contracts led him into conflicts with various heroes and villains. Also, his family's involvement in his life, such as his children getting into trouble and him having to deal with it, are key events.
It's a made - up concept. Harry Potter and Deathstroke belong to two completely different fictional universes. Harry Potter is set in a world of magic, wizards, and Hogwarts, while Deathstroke is a character from the DC Comics' more action - and technology - based universe. There's no official connection between them, so it's likely someone's creative and unorthodox fanfiction idea.
Deathstroke's life story is quite the tale. His journey began in the military where he was a respected soldier. However, the experiment changed him forever. He has a tragic side to his story as well. His family has been a source of both strength and pain for him. His children, for example, have at times been on different sides of the law compared to him. He has faced many challenges and enemies over the years. His story is one of a man who has walked the line between good and evil, often choosing the path that benefits him the most in a given situation, whether it's through assassination contracts or getting involved in larger power struggles in the DC universe.
Well, one possibility could be that Naruto, influenced by Kurama's knowledge or some strange magic, starts to admire Deathstroke's combat skills. So he might try to incorporate some of Deathstroke's fighting tactics into his own ninja style. For example, Deathstroke is known for his precise and calculated strikes, which Naruto could adapt to his Rasengan attacks to make them more effective.
The 'Deathstroke: Rebirth' series is also great. It delves deeper into his backstory, his family relationships, especially his relationship with his son. His skills as a mercenary are also highlighted in a very engaging way throughout this story. There are intense fight scenes and moral dilemmas that make it a top Deathstroke story.
Deathstroke's age in the comics is a bit fluid. It often depends on the creative direction of the story. Usually, he's thought to be in his mid-40s to early 50s.
Kurama might be the link that brings Naruto into Deathstroke's orbit. Since Kurama is such a powerful and unique entity in Naruto's world, his presence could be what makes Naruto aware of Deathstroke in the first place. For example, Kurama could sense some strange energy similar to Deathstroke's and draw Naruto's attention to it.