 As well as being a subgenre of science fiction, these kinds of books can be considered a subgenre of invasion literature, which also includes fictional depictions of humans invaded by other humans (for example, a fictional invasion of England by a hostile France strongly influenced Wells' depiction of a Martian invasion).In 1898, H. G. Wells published "The War of the Worlds", depicting the invasion of Victorian England by Martians equipped with advanced weaponry.It is now seen as the seminal alien invasion story and Wells is credited with establishing several extraterrestrial themes which were later greatly expanded by science fiction writers in the 20th Century, including first contact and war between planets and their differing species.