https://en.wikipedia.org/wiki/Foo_fighter
>The first sightings occurred in November 1944, when pilots flying over Western Europe by night reported seeing fast-moving round glowing objects following their aircraft. The objects were variously described as fiery, and glowing red, white, or orange. Some pilots described them as resembling Christmas-tree lights and reported that they seemed to toy with the aircraft, making wild turns before simply vanishing. Pilots and aircrew reported that the objects flew formation with their aircraft and behaved as if they were under intelligent control, but never displayed hostile behavior. However, they could not be outmaneuvered or shot down.

Then, 20 years after the war this
https://en.wikipedia.org/wiki/Kecksburg_UFO_incident
>The Kecksburg UFO incident occurred on December 9, 1965, at Kecksburg, Pennsylvania, United States.
several years after the war

inb4 its a weatherballoon or soyus capsule
>It streaked over the Detroit, Michigan – Windsor, Canada area, reportedly dropped hot metal debris over Michigan and northern Ohio,[1]

Pic related page 91 of
https://vault.fbi.gov/UFO/UFO%20Part%2012%20of%2016/view
Prisoner of war talking about a "circular aircraft" rising out of a german facillity during WW2

Just 1,5 pages, dont be lazy
https://www.cia.gov/library/readingroom/docs/DOC_0005516188.pdf
Talks about a german engineer that worked on flying saucers

just one paragraph, dont be a lazy cunt here either (the one with big [] around it)
https://www.cia.gov/library/readingroom/docs/DOC_0000015255.pdf
Talks about flying saucers in Argentina and Antarctica

2 men in eastern germany in metallic clothing jump into a flying saucer and fly away in east germany (document from 1952, no idea when the incident happened
https://www.cia.gov/library/readingroom/docs/DOC_0000015464.pdf

And some semi related doc with pics
https://www.cia.gov/library/readingroom/docs/CIA-RDP79B00752A000300130001-1.pdf