Tau'ri-Nakai war

The Tau'ri-Blue alien War was a conflict between the members of the Destiny Expedition and the blue aliens taking place in the unnamed galaxy and the void between it and another galaxy.

Prelude
For an unknown period of time, the blue aliens tried to take over Destiny, landing two blue alien fighters on it and apparently trying to repeatedly bypass the ship's defenses according to what Nicholas Rush learned, but failing and trying a new tactic each time. After the Destiny Expedition arrived, the remaning blue aliens on board abandoned the ship through one of the two fighters located on the ship's hull, but left one behind. After a failed attempt to overthrow Colonel Everett Young, Doctor Nicholas Rush was abandoned on the gravel pit planet by Young with a crashed fighter which he entered and activated its systems. Along with a map of the galaxy's Stargate system, Rush apparently activated a distress beacon inadvertantly which drew the blue aliens to the planet and they captured him, taking him aboard one of their motherships and mind probing him as well as implanting a tracking device in his chest near his heart. The aliens also get a long range communications stone that Rush posseses.

First Attack
Colonel Young, during an attempt to contact Earth, accidentaly connected with a blue alien through the long-range communications device, although the blue aliens seemed unaware of this occurence with Young apparently connecting with one due to the stone they got from Rush. Not long afterwards, when Destiny dropped out of FTL, the blue aliens tracked the ship down, possibly through the fighter still on the hull and send the blue alien mothership containing Rush. The aliens sent a message demanding a surrender and launched an attack on Destiny with blasts from the mothership and fighters attempting to board Destiny. The ship's one working Ancient shuttle was sent out to do battle with the fighters while the ship's weapons are used to battle the mothership. Despite the defense, a fighter managed to get through, latch onto the hull and capture Chloe Armstrong. Young ends up deciding to use the communications device to connect with a blue alien again in order to infiltrate the mothership and rescue Chloe. Young finds and releases Rush who learns who he is through a mind probe before the probe severs the link. Rush is able to use the probe to find Chloe's location, where the fighter bay is, how to pilot a fighter and some other information before killing the blue alien. On Young's order, all of Destiny's fire is concentrated on the mothership even though its starting to overload Destiny's weapons systems. On the mothership, Rush rescues Chloe and the two escape aboard a fighter which they latch onto Destiny to get back on board. After Rush and Chloe's escape, the mothership retreats to FTL, ending the battle.