James T. Kirk/Starfleet career/Farragut/First officer

Shortly after, Kirk was promoted to first officer of the Farragut, breaking his father's record as the youngest first officer in Starfleet history. However, Kirk had a few months before he would actually assume the post as Kirk needed to train his replacement for his current duties first. ()
During this time, under Fleet Captain Pike, the Enterprise and the Farragut were assigned to bring a deuterium mining station online. During the mission, clashed with his brother Sam, the ship's xenoanthropologist, several times over his promotion.
Kirk helped Nyota Uhura to figure out the signals that she was receiving from aliens in the Bannon's Nebula. During his time with Uhura, he suffered a broken nose inflicted by her during one of her hallucinations, initially believed to be associated with lack of sleep and deuterium poisoning. He admitted to her that he had previously gone days without sleep and experienced a case of deuterium poisoning himself, but that he had never ed a superior officer before. 
Nonetheless, Kirk continued to believe in Uhura, and helped her find the true cause of the hallucinations. With help of his brother Sam, they focused on the possibility that she was being contacted by an extradimensional lifeform that was located in the nebula. After figuring out what the lifeform was trying to communicate, Pike had the Enterprise destroy the mining station. Following the mission, Kirk attended a celebration on the Enterprise where he met his future first officer and best friend Spock for the first time. ()
Kirk later returned to the Enterprise on a short-term posting; his commanding officer felt Kirk would benefit from shadowing Enterprises first officer, Una Chin-Riley before he assumed the same position on the Farragut. During this time, La'an revealed her history with his alternate self, but Kirk revealed to her he was in a relationship with Carol Marcus who was pregnant with their son. ()