Answer:
Lincoln tried to free slaves in the border states by buying them. The record bears this out. Lincoln tried in Delaware and won congressional approval to apply the principle to all states. But with no slave owners willing to come to the table, the effort failed.
Hope this helps!!!
Tensions between the United States and the Soviet Union over Cuba had been steadily increasing since the failed April 1961 Bay of Pigs invasion, in which Cuban refugees, armed and trained by the United States, landed in Cuba and attempted to overthrow the government of Fidel Castro
So that they can use them as primary sources to find out the most accurate facts
