What is associated with: by 1948 all but one of the 9 in this group charged in a 1931 crime had been freed?

Based on the clue 'by 193 rome had sunk so low juliannus bought this ...', what is the answer? What is associated with: by 1940 artem mikoyan mikhail gurevich produced the first of these soviet fighter planes? What is associated with: by 1942 fdr had appointed 7 new men to this body it took a while but he got the packing he had… What is associated with: by 1946 hed catalogued over 29000 galaxies almost 4000 asteroids 1 new planet pluto? What is associated with: by 1959 after just 11 years in business it was the worlds leading motorcycle manufacturer? What is associated with: by 1962 this brand summited became the best selling toothpaste in the us guess i wont be setti… What is associated with: by 1965 this teenage austrian was so muscular he was named junior mr europe? What is associated with: by 1966 the air force had logged 10147 sightings of these but didnt believe any?