General Douglas MacArthur was an American war hero and one of the most popular armed service members of the 1940s and 50s.

But what few know about him is his strong interest in the UFO phenomenon, so much so that he warned of “sinister forces” beyond Earth three different times publicly in the last 15 years of his life.

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After he died, John Keel wrote a great article on MacArthur, and said government sources told him MacArthur briefed some in 1958, warning he thought UFOs were “scouting this planet to prepare for a massive invasion”.

What’s also interesting is that when MacCarthur was still military governor of Japan in the late 1940s, he worked to gather UFO reports in the region and in other areas of the globe, specifically military interactions.

Two of these warnings were given in speeches — the rarely heard audio is presented in the video below.

So, what do you think? Was MacArthur’s warning that UFOs were scouting Earth for future invasion just paranoia? Or could it have been a driver of early efforts to militarize space?