User:Forerunner/BSG parallels
From Halopedia, the Halo wiki
Humanity rebuilds itself
Cyclical time
In the season 1 episode "Flesh and Bone", Leoben explains that humanity is destined to replay the same events over and over, though their specific role may not necessarily be the same.
When the humans first encountered the San 'Shyuum, they went to war with the technologically-advanced race, who based their technology on that of a long-dead civilization. They soon formed an alliance, trading military defence for technological gain. While they were powerful allies, this didn't mean that they supported each other. Their empire would collapse in a war with another space-faring civilization, worsened by the effects of a parasitic organism.
Over the 150,000 year period after the firing of the array, the Milky Way's races slowly returned to their might.
When the Sangheili first encountered the San 'Shyuum, they went to war with the technologically-advanced race, who based their technology on that of a long-dead civilization. They soon formed an alliance, trading military defence for technological gain. While they were powerful allies, this didn't mean that they supported each other. Their empire would collapse in a war with another space-faring civilization, worsened by the effects of a parasitic organism.
The homeworld lost to the stars
BSG and Primordium both involve necessary information about the human homeworld being lost in a dark-age some time after leaving it to colonise other worlds. In BSG's case, it was the location of Kobol, itself. In Primordium's, it is Erde-Tyrene's status as the human homeworld.