What is associated with: 180000 dwell in this city southwest of columbus northeast of cincinnati?

Based on the clue '18 years of deadly rage action towards universiti...', what is the answer? What is referred to by '180 minutes after noon'? What is associated with: 1800 seconds before 811 am? What is associated with: 1800 spain cedes this large territory to france? What is associated with: 1801 1835? What is associated with: 1802 whats that you say i said whatcha composin oh the kreutzer sonata? What is associated with: 1803 this chief justice declares any act of congress that goes against the constitution is ill… What is associated with: 1806 1861 uk how do i heart?