Jeffrey Sinclair is a fictional character from the science fiction television series Babylon 5. He serves as the commander of the space station Babylon 5 during its early years, playing a crucial role in the political and military conflicts of the time. Sinclair is known for his strong leadership skills and commitment to peace among the various alien races. In the series, Sinclair's character is portrayed as a former fighter pilot and a veteran of the Earth-Minbari War. His experiences shape his views on diplomacy and conflict resolution, making him a key figure in the station's efforts to maintain stability in a turbulent galaxy.