In 2376, USS Voyager became trapped in orbit of Kelemane's planet. Because of a time displacement, approximately one day on the planet passed for every one second that Voyager observed while in orbit. During this time Voyager was able to watch the development of civilization on the planet.
Because his holomatrix would not be affected by the time differential, The Doctor was transported down to the Central Protectorate to investigate the culture. Transmissions picked up by Voyager showed the society there to be tolerant. A transporter malfunction caused The Doctor to remain on the planet for a little over three years, during the ~20 minutes it took the crew to fix the malfunction. During this time The Doctor lived in a building own by Doric, became part of a family with Mareeza and Jason Tebreeze, and became a fan of the Kelemane's planet sport team Mountain.
The Central Protectorate was a military power. When a short war broke out with a neighboring state, the Tactical Air Command was ordered to respond.