The Nazis made pacts with these ETs during WW2. In order to focus on building Neuschwabenland in Antarctica, Hitler faked his death and agreed to transfer some Nazi scientists and engineers to America via Operation Paperclip. The Nazis then built bases on the Moon and later Mars,

During WW2, the Nazis acquired ET technology. Hitler then decided to fake his death and move most of his forces to Antarctica, establishing Neuschwabenland. America allowed Hitler to do so in exchange for over 1,600 Nazi scientists & engineers. They called it Operation Paperclip.

Wernher Von Braun was the leading figure in the development of rocket technology in Nazi Germany. He later became head of the engineering program for NASA, developing space technology. Von Braun was one of over 1,600 Nazis the US gov't acquired via Operation Paperclip since 1945.

The Nazi's reached the Moon by reverse engineering ET technology, but it was thanks to the work of Nikola Tesla that mankind developed free energy, teleportation & time travel. Andrew Basiago and others have testified about their experience with teleportation & time travel tech.