The film was marketed as being "based on true events."

Like the previous film, the story will have some elements based on true events.

Many true historical events and characters are used as the basis for the story.

Are these books you're reading based on true events, usually?

The official English site states it to be based in true events.

Certain scenes in the series are based on true events.

As so often in life, we will probably never know the true events.

As in the earlier book, part of the plot is based on true events.

The film is touted as being based on true events.

All of this talks about true events that sometimes happens in the world.