Alpha/Beta Quadrant Overview
Tarlac was a location set in the Alpha Quadrant.
In 2256, its location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the USS Discovery. (DIS: "Magic to Make the Sanest Man Go Mad")
In 2257, during the first Federation-Klingon War, this location was occupied by the Klingons. (DIS: "The War Without, The War Within")
In 2259, Tarlac's location was labeled on a stellar cartography chart that was seen on the USS Enterprise's ready room viewscreen. This location's symbol had a blue color, indicating that it was affiliated with the United Federation of Planets. (SNW: "Strange New Worlds", "Spock Amok")
Tarlac's location was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters in 2399 and on the bridge of the USS Titan-A in 2401. This location was in or near to Federation space. (PIC: "Maps and Legends", "The Next Generation", "Disengage")