Tierra was a female Deltan Ambassador who served as a negotiator for Delta IV in talks with the Carreon in 2379 and 2380. She eventually asked for the assistance of Federation President Nanietta Bacco when efforts to obtain a Carreon water reclamation system yielded no results after almost six months.

One of Tierra's aides was named Kedda. (ST novel: Articles of the Federation)

Tierra would appear to be an ambassador for the Deltan government, independent of the Federation Diplomatic Corps, though this is not certain.
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