Expedition to Antarctica
The expeditions and the creation of the bases were motivated by the thought that aliens might be living there. After the German encounter with the aliens in the 1930s a base was subsequently established in Antarctica with no operational or civilian justification.
After the Roswell crash in 1947, the United States Expedition to Antarctica was established (Operation High Jump).
It is possible that the presence of aliens was created after the Germans established a base and transferred their alien technological research there for reasons of confidentiality. So that an alien base was never there only after the establishment of the German base their presence was increased and created the illusion that alien bases are located there.
The most important question is whether the joint scientific research between aliens and Germans was based on a philosophy of objectivity and non-intervention after giving the technological knowledge on the part of the aliens. Apparently for the aliens the approach of scientific sharing was for the sake of peace, and a psychological test. It was the law of free will that prevented them from advising what to do with the knowledge they provided to the Germans.
The same thing happened in the United States when the grays provided technological knowledge, in addition to other agreements concerning the public …
The reason is a test for humanity when the tests are performed on superpower countries by giving knowledge and watching its implementation. Thus it seems that psychological tests based on the law of free will have been carried out to test whether we are ready for the end of humanity's control by the hive mind.
An important point to note are cases where high-ranking officials tried to share their knowledge and were eliminated in a variety of ways, whether by humans or by aliens.
As I understand it, the reason for preventing information sharing seems to be possibly because of a militant approach that can ignite uncontrollable events such as unbalanced nuclear armament and the creation of a global threat. It is possible that for these reasons attempts to tell the truth to the public were thwarted. I believe that the approach has always been psychological (psychological test - psychological readiness) and when information sharing is interpreted otherwise the attempt of that person to disseminate information to the public that could lead to uncontrollable global armament was thwarted.
Things seemed to be done in a cold way (thwarting the dissemination of information) when the forecast was negative on the part of the aliens and it was easy to interpret things in a hostile way on the part of humans.