The Quadra Alliance was an alliance between the ChCh-t, the Cyth, the Tarth, and (under force) the Maug. It was a very powerful alliance that lasted for some time. The alliance is best know for nearly destroying both the Human and Re'lu races. If not for the technology that the Maug were able to send the Humans, both Human and Re'lu forces would have been easily outnumbered and destroyed.
The alliance was a creation of the Cyth . The alliance's first members were the ChCh-t . The Cyth discovered the ChCh-t when they came to JkNd-d, looking for new materials for their psionic juice. They found the odd insectoids to be fascinating. When they discovered that the queens had some psionic ability, they were extremely excited. The Cyth helped to guide the ChCh-t into the stars. They gave the ChCh-t some ships and the information they would need to build more ships. Happy with the Cyth benevolence, the ChCh-t happily became the Cyth's allies.
The second group to join the Cyth were the Tarth. The Cyth found this alliance much harder to construct. The Tarth had originally wanted to pummel the Cyth, which in all fairness is what the Tarth want to do to any race. It was only through much work, and the sacrafice of several minor worlds, that the Cyth were able to coerce a lasting treaty. What the Cyth got in return was worth the inconvience. The Cyth scientists were in desperate need of space craft that could weather the harsh environments that they went to in search of new materials for their juice. The Tarth "temper" had forced their scientists to build extrememly tough ships. The toughness of the Tarth ships proved invaluable to the Cyth scientists.
The Maug were the last group to join. Their "joining" the alliance was not exactly their choice. In fact, it was forced on them. The maug first came into contact with the Tarth. They seemed to be on good terms with them, and the other Quadra members. The Maug were cautious, however. They had had no need of weapons on their planet for many years, but seeing that the Tarth never went without weapons made them nervous. The Maug began to arm themselves. The attack came from the Tarth and the Cyth at the same time. The Cyth attacked because they wanted to study the Maug homeworld. The Tarth attacked because they wanted to smash something. Even without the time to fully prepare, the Maug were able to defend themselves for some time. Seeing that their allies were in trouble, the ChCh-t queen sent them help. The addition of the ChCh-t hord sealed their fate. The shear numbers the ChCh-t brought were able to wear down and defeat the Maug.
The Cyth scientists began to study Maug-hau. The horrified Maug watched as the Cyth scientists tore apart their world. The Maug soon began to rebel. They fought with guerrilla tactics, and sabatoged any Cyth machines that they could get their hands on. Eventually, the Cyth lost all patients with the Maug. There were those who wanted the entrie race exterminated, but their obvious technological prowess made them too valuable for that. The entire population of Maug-hau was relocated to Arganis X.
The Quadra Wars refer to the war between the Human/Re'Lu and the Quadra Alliance members. When the Quadra Alliance members were pushed back, the Maug were freed to their own fates. Oddly, they showed little or no gratitude to the Human and Re'Lu who liberated them.