Where Did the Jem'Hadar Come From?

The Dominion formed around 2000 years ago according to their history, while other mentioned dates included 10,000 years ago and more. So what is the tale of the Dominion's founding? The Changelings have been around for millennia and are immortal, so how old is the Dominion and how did it form? The Vorta, the Jem'Hadar, both are genetically engineered species, but what were they first? Let's take a look at the on screen and apocryphal lore of Star Trek to form the history of the Dominion into a more comprehensive timeline.

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Outro Animation made by @icarogabriel17