The Kyrian people are warp capable a species from the Delta Quadrant.
In 2374 they were an aggressive people who had strained relations with the neighbouring Vaskans. This resentment boiled over into war when the USS Voyager signed a trade agreement with the Vaskans.
A group of Kyrians, lead by Tedran, beamed aboard the Voyager and took several people hostage. They were defeated when Tedran was killed by the Vaskan ambassador.
Several days later Voyager was attacked by nine Kyrian ships. Several troops managed to board Voyager and stole various pieces of technology before escaping. The Voyager then left the area.
The war between the Vaskans and Kyrians that followed was devastating and almost completely wiped out Kyrian culture. Over the next few centuries they became second class citizens in a predominantly Vaskan culture.
By the 31st Century Kyrian culture was reasserting itself. Once aspect of this cultural rennaissance was an investigation into what was known as The Voyager Encounter. After seven centuries the Kyrian view of the event was hugely distorted. They believed that Voyager was a warship that had been hired by the Vaskans to attack Kyrian space and that the Vaskans gave them the location of a wormhole in exchange. In their version of events, Voyager used biogenic weapons to cause mass deaths on the Kyrian homeworld and killed Tedran, who was by know regarded as Kyrian martyr.
The Kyrians also made incorrect assumptions about the nature of the crew. This included Chakotay having a maori tattoo, Seven of Nine being a full Borg and Kazons being crew members. They also believed that the Doctor was an android rather than a hologram.
This version of events was put forward by Quarren in his Kyrian Museum of Heritage until he discovered a back-up copy of the the Doctor in an Emergency Medical Hologram backup module found beneath a Kyrian city. This device had originally been stolen by the Kyrians in their attack and the Doctor had lain dormant in it ever since.
After he was reactivated, the Doctor was considered a war criminal. However he explained the real history of the Kyrian/Vaskan conflict. Although this caused the old tensions between the two races to once again boil over, it led to a new understanding between them and eventually created a harmonious society.
The copy of the Doctor became the Kyrian Surgical Chancellor for many years before leaving in a one man ship with the aim of reaching the Alpha Quadrant. (VOY: "Living Witness")