Secunda is a town that was specifically built to service the second Sasol coal liquefaction plant, which was constructed with the intention of making South Africa less dependent on imported oil after the oil crisis of 1973/4. The plant, called the Secunda CTL refinery, is currently the largest coal liquefaction plant in the world. The town itself was proclaimed in 1976, and the name Secunda is Latin for 'second', referring to the fact that this was Sasol's second refinery.
During the armed struggle against apartheid, the African National Congress (ANC) attempted to bomb the refinery twice, in 1980 and then again in 1985. After the first attempt, a driver at the refinery, Patrick Chamusso, was wrongly accused of being involved in the bombing. His story is told in a 2006 thriller film, Catch a Fire. (GPS coordinates: 26.5346 S, 29.1654 E).