Based on the clue 'by 193 rome had sunk so low juliannus bought this ...', what is the answer?

What is associated with: by 1912 this merchants company owned more than 500 stores bearing his name across the us? What is associated with: by 1918 this russian born mob mastermind was running a floating crap game with bugsy siegel? What is associated with: by 1924 the phrase my flag in the pledge of allegiance had been changed to this longer phrase? What is associated with: by 1929 the year he turned 25 j op had published 15 papers in this new field of subatomic phys… 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 1948 all but one of the 9 in this group charged in a 1931 crime had been freed?