Endor (also known as the Forest Moon of Endor and the Sanctuary Moon) was a small forested moon orbiting the planet of Coruscant. An enchanted world, Endor was notable for being the native home of the Ewoks, and being the location of the Battle of Endor.
Around 3,645 BBY, the Republic had set-up a secret bio-lab on the moon.
The moon's history was constantly being shaped, introducing new species and technology which had to be integrated into the local politics and ecosystem. Endor was set aside as a protected nature reserve during the Galactic Republic, giving it the name Sanctuary Moon.