Berlín conference of 1884 - 85 ( Congo Conference ) regulated European colonization for trade in Africa during the New Imperialism period
Maryland was the thirteenth and final state to approve the Articles of Confederation, three years after the deadline Congress had set.
War with Mexico and the alamo and it also sparked the transcendentalist era, and plus it was one of the earliest examples of civil disobedience by henry David Thoreau
Physically, as well as psychologically, the Berlin Wall was significant because Berlin was the only city physically separated by the Cold War between the Soviet Union and its Eastern Bloc and Western allies. ... It was possible to limit the entire Cold War to this one nexus point. So I think it was necessary