History:
Turkana IV. A Class-M planet, site of a failed Federation colony. The colonial government began to collapse in 2337, leaving dozens of rival factions fighting for control. Eventually, the colony's main city was destroyed, and the population was forced to move underground. In 2352, the remains of the Turkainian government broke off all diplomatic ties with the Federation. By the time the Enterprise-D visited the planet in 2367, the colony was largely controlled by two rival cadres, the Coalition and the Alliance; each controlled approximately one-half of the colony. Turkana IV was the birthplace of Enterprise-D Security Chief Natasha Yar, who was born there in 2337. Yar's younger sister Ishara Yar, was born on Turkana IV in 2342.
TNG "Legacy" ; Star Trek Encyclopedia II
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