Halo

Summary
Halo is a science fiction continuum based around the video game series of the same name and its expanded universe. It focuses on the galaxy-wide conflict between the UNSC, a collection of somewhat loyal colonies centred around Earth, and the Covenant, a theocracy consisting of several species led by the "Prophets". The Covenant discovered the existence of humanity at the planet Harvest. Unfortunately, a power struggle among the Prophets and a misunderstanding involving a Grunt, watermelons, and a floating pink balloon resulted in the destruction of said planet and the Prophets declaring war on the UNSC.