A number of notable Vulcans have joined Starfleet over the years. However, Sub-Commander T'Pol was the first of them to be enlisted in active service of a Human vessel. Following Earth's first-contact with the Klingons during the Broken Bow incident of 2151, T'Pol was assigned to the bridge of the Enterprise. Her role in Enterprise's mission was to serve as chaperone and representative of Vulcan's interests while Archer and his crew ensured safe passage for a Klingon known as Klaang back to his homeworld. This mission would result in further encounters with the Suliban Cabal, and the eventual drawing of humanity into the Temporal Cold War. While T'Pol initially found herself in a position of distrust among her colleagues, in time she would rightly be accepted as a member of the NX-01 crew. Frequently, T'Pol's extensive knowledge of many different alien cultures and customs would prove beneficial to Enterprise's mission. Although her demeanor could initially be seen as harsh or off-putting, T'Pol's encyclopedic knowledge of different cultures and customs left her with a unique perspective and sense of empathy. Naturally, these qualities would eventually endear her to the rest of the crew. T'Pol's assignment to the Enterprise would become a pivotal cornerstone in the maintained partnership between United Earth and the Vulcan High Command - a partnership that would lead to the formation of the United Federation of Planets.