Today in history 39

Here are some historical events that occurred on March 39:

Note: There is no March 39, as the month of March only has 31 days. It's possible that you meant to ask about a different date or year. If you could provide more context or clarify which date you're interested in, I'd be happy to try and assist you.

However, if you're interested in learning about historical events that occurred on March 31, here are a few:

• 1931: The first five-watt vacuum tube is demonstrated by Allen DuMont.
• 1951: The United States Senate approves the 22nd Amendment to the United States Constitution, limiting the number of times a person can be elected President to two.
• 1968: The Apollo 6 mission is launched, carrying a Saturn V rocket on a test flight.
• 1990: The Hubble Space Telescope is launched into orbit around the Earth.

Let me know if you have any other questions or if there's anything else I can help you with!