In 1977, residents of Colares, Brazil reported being struck by beams of light from objects, prompting the Brazilian Air Force to launch Operação Prato. The investigation is real; what it found remains debated.

Operação Prato matters because it is a named military investigation of mass reported physical effects — a rare official response to a sustained event, with the object identity still unresolved.
Residents of Colares reported being struck by beams of light, describing burns, puncture marks and fatigue. These are reported effects, not established medical findings.
Documented
The resident reports are documented.
The Brazilian Air Force launched Operação Prato to investigate the reports. The investigation existed and produced records.
Documented
The military investigation is documented.
The Brazilian Air Force later released files (2005). The object identity and the causation of the reported effects remain debated; the “attack” framing is reported testimony, not established fact.
Debated
The object identity and the reported physical effects are disputed.
The beam-attack language must be read as reported testimony. The released files do not by themselves establish an extraordinary cause.
Unverified
Any deliberate attack or extraterrestrial origin is unverified.
These sources do different jobs: the Brazilian Air Force files are the official record, and Wikipedia and MUFON are secondary treatments. None establishes the object identity.
The compiled reference account.
The released investigation files.
The civilian research files.