The 1970s produces the modern foreign-government UAP record. GEPAN/GEIPAN (France, 1977), the Brazilian Air Force's Operação Prato investigation (1977–78), the Petrozavodsk phenomenon investigations in the USSR (1977), the Kaikoura lights filmed by an Australian TV crew over New Zealand (December 1978), and the 1979 Manises emergency landing in Spain all date to this decade.
The US institutional record is comparatively quiet — Blue Book is closed, AATIP/AAWSAP is decades away. But the December 1972 Apollo 17 'three-dot' lunar observation, the September 1976 Tehran incident (the most-cited Cold War radar/visual case involving fighter intercept), and the 1976 Carter executive-branch UFO-disclosure correspondence are all in the public record.
Why this matters. The 1970s is when the UAP question becomes properly international. Treating it as a US-only phenomenon stops being defensible by 1980.