Many Hollywood movies were series, such as the Godfather series, the Star Wars series, and the Avengers series. These series of movies all had a common theme and storyline. Through continuous sequels and prequels, they formed a complete movie series. In addition to these classic series, there were also many other types of Hollywood movies that formed series, such as action films, comedies, science fiction films, and so on.
It varies. Some Hollywood series are directly inspired by true events and try to stick closely to the facts. Others take elements from real life and build a fictional story around them. And then there are those that are purely made up for entertainment.
Not all series from Hollywood are based on true stories. Some are purely fictional, while others might draw inspiration from real events but with significant fictional elements added.
Well, it's not a straightforward yes or no. Many Hollywood series blend elements of truth with fiction. Sometimes they might be loosely based on real events and then fictionalized to make it more entertaining.