Dax (25th century)

To begin with, Yanlon Dax was a nervous young ensign. He was assistant science officer on board the USS Nelson. After Ezri's death, Yanlon was forced to take the Dax symbiont, as is was found dying inside an escape pod, still in Ezri's dead body. After the operation Yanlon was taken to the syimbiosis comition for two months, trying to cope with the nine other memories. After recovery, Yanlon was summoned to the Nelson because of a borg attack on a federation colony. Yanlon was asked to board the USS Destroyer, to prevent a core breech. Using Tobin Dax's memories, Yanlon was able to eject the core and help neutralize the borg boarding party. To congratulate Yanlon in his bravery, he was promoted to lieutenant and took command of the Nelson.

Now Yanlon had control over the Nelson, he was ordered to gather information regarding the Klingons. After Yanlon discovered that the Klingons had built a "dooms day" device, which had the ability to destroy an entire planet with one shot. Yanlon was able to get a federation fleet to attack and destroy the dooms day device with help of the Klingons as they considered it to be unhonorable not to destroy a planet without a battle. When the dooms day device was destroyed, Yanlon was promoted to lieutenant commander and was re-assigned to the USS Destiny.

Yanlon Dax was ordered to take the Destiny to a nebula where he made first contact with a new race called the Anistors. The Anistors were peaceful and religious race who believed that they were not to make contact with the outside world. And for that reason, Yanlon put the entire nebula under isolation.

Yanlon was once again promoted to commander and was re-assigned to the USS Odyssey to patrol the neutral zone on the Romulan border. Starfleet intelligence found out that the Romulans had designed a new weapon called a plasma torpedo which was enough to weakon a ship's hull integeroty to less than 50%. Yanlon's orders was to find the weapon and find a defence for them.

Once the defence to the plasma torpedo was found, Yanlon was promoted to captain and then re-assigned to the USS Horizon.