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Tracer ammunition was first developed by the Terran Hegemony in 2300. For use in autocannons, it was used to coordinate fire during nighttime operations, with self-illuminating "tracer" rounds interspersed among the normal ammunition. However, the popularity of cheap, mass-produced firepower lead to a decline in tracer ammunition. Modern autocannons, if they bother to arm themselves with tracer rounds, tend to intersperse one tracer round between every fifty normal rounds.
- Tactical Operations p.v353, "Tracer Autocannon Ammo"