During May 1962, personnel at Comandante Espora Naval Air Base in Argentina reported luminous objects entering restricted airspace.

Espora matters because it is an Argentine naval-base incursion case with official reports.
Documented
Personnel reported luminous objects in restricted airspace
Documented
The incursions are documented in naval reports
Debated
The identity of the objects
Unverified
Extraterrestrial origin
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.
Documented source.