to have an entirely human crew, as it was set before the formation of the Federation, although the vessel did carry Phlox, a Denobulan serving in a medical exchange program, and T'Pol, then serving as an observer from the Vulcan High Command. Star Trek: The Next Generation saw the introduction of Starfleet's first Klingon officer. Other races—such as Bolians, Betazoids, and Trill—were seen, and given more central roles, in later series; some of these, notably Klingons, had been shown as enemies in earlier episodes. Various episodes show that Earth/Federation citizenship is not a necessary pre-condition for joining Starfleet. T'Pol of Vulcan is shown to be the first non-human Starfleet officer, receiving a commission as a commander following the Xindi mission and her resignation from the Vulcan High Command. Even after the Federation's formation citizenship was not required; several officers are from planets that are not part of the Federation. For example, Star Trek: TNGs Ensign Ro Laren, a Bajoran aboard the USS Enterprise-D; her fellow Bajoran Kira Nerys, who was field-commissioned as a Starfleet commander so that she could aid the Cardassian resistance during the Dominion War; and Ferengi Nog, who enters Starfleet Academy in season four of Deep Space Nine; all were from non-member planets. In addition, Quinn and Icheb from Star Trek: Voyager both spoke of joining Starfleet. An example of the process imagined by the writers is given when the character Nog attempts to apply to the Academy. He is told that since he is from a non-member world (Ferenginar), he requires a letter of recommendation from a command-level officer before his application can be considered, with the implication that this is the standard procedure for all non-Federation applicants to Starfleet. In the Star Trek Expanded Universe, an example of what typically becomes of a new Federation member world's military is depicted when the Bajoran Militia is integrated into Starfleet upon Bajor's entry into the Federation. See also Star Trek uniforms References External links Fictional elements introduced in 1966 Star Trek organizations Space navies