One of the clan's leaders was Marshal Kyruul. After his death, he was buried in a tomb in the sands of Mare Sirenum in a place known as the Fields of the Dead. By the latter half of the 20th century, Argyre had not adopted the sleeker bio-armour that most of the Martian clans wore by that time.
In the year 1997, the clan was led by Lord Xznaal, who collaborated with British Science Minister Edward Greyhaven to use the Mars mission to bring his clan to Earth. As an act of deception, he claimed that Great Britain was subject to the rule of the Argyre clan and its lord under Martian law. When Xznaal was crowned King of England, clan members began to enforce its rule in the United Kingdom with the support of their warship. Once in control, they created death camps for their human slaves and began experimenting on the prisoners and manufacturing the Red Death to kill the Eighth Doctor.
Their actions led to Lord Greyhaven realising that his allies had betrayed him. He triggered the Mars Orbiter's rockets by remote control and set it on a collision course with the Argyre clan's holdings. Though Greyhaven was killed by Xznaal, he was too late and could only watch helplessly as the Orbiter obliterated his entire clan. Due to the limited resources on Mars, the only remaining asset the clan had was its warship in orbit. To avenge his clan, he attempted to unleash the Red Death on Earth and wipe out humanity but was defeated by the Doctor. The sole remaining warship was destroyed by strafing from RAF fighters which ended the Martian threat to mankind. (PROSE: The Dying Days)