Yes. In the 60s the United States Department of Defense bought most of the output of all semiconductor manufacture. I found a reference [1] that claims the DoD

Yes. In the 60s the United States Department of Defense bought most of the output of all semiconductor manufacture. I found a reference [1] that claims the DoD purchased 70% of the industry output in 1965. [1] https://books.google.com/books?id=7o0rAAAAYAAJ&lpg=PA6&ots=ZQbVUvUiCt&dq=dod%20share%20of%20integrated%20circuit%20market%201970s&pg=PA6#v=onepage&q=dod%20share%20of%20integrated%20circuit%20market%201970s&f=false https://books.google.com/books?id=7o0rAAAAYAAJ&lpg=PA6&ots=Z... [edited to clarify that this is the United States DoD]