What is associated with: begun in the 2nd century bc this road of trade stretched 4000 miles from china to the mediterranean?

Based on the clue 'begun in 312 bc originally 20 feet wide this firs...', what is the answer? Based on the clue 'begun in 312 bc it was known in antiquity as the q...', what is the answer? Based on the clue 'begun in japan this chain of math reading centers...', what is the answer? What is associated with: begun in september 1940 the german bombing of this capital was known as the blitz? Based on the clue 'begun in the 600s the potala palace in lhasa is th...', what is the answer? What is associated with: begun jan 21 1968 the battle for this marine outpost may have been an nva diversion before the… What is associated with: begun more than 2000 years ago meaning summers end samhain was a celtic festival that has evol… What is associated with: begun on jan 1 1660 his diary held thrilling accounts of the plague the great fire of london?