Battle of Atlantis

Battle of Atlantis in 2005.

The Wraith sent one Hive Ship to attack the City of Atlantis. The ship was destroyed in a joint effort between John Sheppard, in a puddle jumper filled with explosives, and the Earth ship USS Daedalus under the command of Steven Caldwell who rescued him before completing his suicide mission with his actual death.

The Wraith responded to this by sending 12 more Hive Ships. This was too much for the defence forces of Atlantis to handle, so they made a remarkable maneuver. They let the Wraith know, through the link established by Teyla Emmagan, that they were going to destroy the City of Atlantis, before the Wraith could establish a foothold by the stargate there. The Wraith then waited and saw the city explode with nothing left. What really happened was that a bomb was detonated over the shields of Atlantis. Immediately after that, USS Daedalus cloaking device engulfed the whole city, leaving nothing to be seen.

The Wraith pulled back, but the secrecy of Atlantis is now even more stronger for the expedition. (ATL: "The Siege, Part 3")