What happened in the spring of 1787?

During the Battle of Verdun? How did the attack on Pearl Harbor affect the US' further involvement in World War 2? How many times stronger is a volcano eruption than a atomic bomb? Which US President provoked the War with Mexico in 1846? What have historians concluded from studying the early cave paintings? Why is United Kingdom the correct name for the country not Great Britain? What did the Neolithic people paint? What kind of activities did the mohawk tribe do? What were the worst concentration camps and where are they located? What are some reasons people place their money in banks? When the last severan emperor died Julius Caesar became dictator true or false? What is the best explanation of the term philosophy? What happened to Alexander Hamilton's brother? Where was Geronimo born? How did slavery weaken the Western Roman Empire? What American law schools teach civil law system rather than common law? Who was the Confederate General who was the supreme commander of the Confederate army? What happened to China after Shi Hangandi died? What state is the first state to greet the sun everyday? What country does pizza comes from?