What is associated with: begun more than 2000 years ago meaning summers end samhain was a celtic festival that has evolved into this holiday?

What is associated with: begun in september 1940 the german bombing of this capital was known as the blitz? What is associated with: begun in the 2nd century bc this road of trade stretched 4000 miles from china to the mediterr… 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 on jan 1 1660 his diary held thrilling accounts of the plague the great fire of london? What is associated with: begun under napoleon this 165 high 150 wide landmark was completed in 1836? Based on the clue 'behave or ill turn this car around right now this ...', what is the answer? What is referred to by 'behaviorist burrhus frederic'?