The Martians, also known as the Invaders, are the main antagonists from the H.G. Wells 1898 novel The War of the Worlds. Their efforts to exterminate the populace of the Earth and claim the planet for themselves drive the plot and present challenges for the novel's human characters. They are notable for their use of extraterrestrial weaponry far in advance of that of mankind at the time of the invasion.

The War of the Worlds is a science fiction novel by English author H. G. Wells. It was written between 1895 and 1897, and serialised in Pearson's Magazine in the UK and Cosmopolitan magazine in the US in 1897. The full novel was first published in hardcover in 1898 by William Heinemann. The War of the Worlds is one of the earliest stories to detail a conflict between humankind and an extraterrestrial race. The novel is the first-person narrative of an unnamed protagonist in Surrey and his younger brother who escapes to Tillingham in Essex as London and southern England is invaded by Martians. It is one of the most commented-on works in the science fiction canon.