The first episode of Stargate SG-1 aired, introducing the series to audiences and launching the franchise.
The first season of Stargate SG-1 was released on DVD, making the series available for home viewing.
The show received recognition at the Leo Awards for its outstanding visual effects.
Official announcement of the Stargate Atlantis spin-off series, expanding the Stargate universe.
The Stargate is discovered in Giza, Egypt, by archaeologists under the supervision of Dr. Daniel Jackson.
The Stargate is activated for the first time in modern history, enabling interstellar travel.
U.S. Air Force establishes Stargate Command to explore and manage Stargate operations.
SG-1 team, led by Colonel Jack O'Neill, embarks on its first mission to the planet Abydos.
SG-1 discovers the existence of the Goa'uld and their system lords as major antagonists.
SG-1 establishes an alliance with the Tok'ra, a faction opposed to the Goa'uld.
SG-1 learns about the Replicators, a dangerous self-replicating machine species.
SG-1 allies with the Asgard, an advanced alien race and key allies against the Goa'uld and Replicators.
Replicators attack and destroy Midway Space Station, a key outpost for Earth's allies.
SG-1 successfully kills Apophis, one of the most powerful Goa'uld system lords.
With Asgard technology and SG-1 efforts, the Replicators are defeated temporarily.
The Goa'uld system lords lose power following multiple defeats by SG-1 and their allies.
SG-1 uncovers critical technology and history related to the Ancients, the builders of the Stargates.
SG-1 faces the Ori, a powerful and fanatical group threatening the galaxy.
SG-1 destroys the Ori Supergate, crippling their ability to invade the Milky Way galaxy.
