Watch Defiance Online at Couchtuner . In the near future, during a war with a race of invading aliens called the Votan, alien terra-forming technology is accidentally unleashed on Earth, creating a new planet dangerous to both humans and the aliens. where they eventually realise that they must learn to live together to survive. The Votans had thought Earth was uninhabited, but upon their arrival in 2013 discover that humans are living on the planet, who respond to them with hostility and suspicion.The wars tore apart the planet for seven years, until their culmination in 2030 in the apocalyptic “Arkfall” event, when the Ark fleet in orbit mysteriously exploded. The aliens think a rogue human commander was responsible, while humans suspect it was an alien weapons experiment gone awry. Millions of Votans died in hypersleep. During the Arkfall, destroyed Arks rained down on Earth and accidentally released terraformer technology.