Step 1 : Introduction to the question "What happened in the year written MCMLXIX?"
Roman numerals, the numeric system of ancient Rome, uses combinations of letters from the Latin alphabet to signify values. They are composed of seven Latin letters. They are, in this order, from lowest to highest: I (one), V (five), X (ten), L (fifty), C (one hundred), D (five hundred), and M (one thousand). The United States' Apollo 11 was the first manned mission to land on the Moon, on July 20, 1969. To convert 1969 to Roman Numerals you need to split it up into place values (ones, tens, hundreds, etc.) 1,969 = 1,000 + 900 + 60 + 9. Combine the values together to get MCMLXIX.