Answer:
Fort Sumter in Charleston, South Carolina was one of the four forts that had not yet been captured by the Confederates, so Lincoln wanted to keep the fort at all costs in order to keep the Union's strenght in the South. He sent unarmed ships to supply the fort with military and food supplies. The Confederate President Jefferson Davis gave command to Southern forces led by General Beauregard to bomb the fort on April 12 to force it to surrender, which happened.
The Northern states all supported Lincoln. He called for the fortresses to be reclaimed and the Union to be preserved. At the same time, 75,000 volunteers were called up for a period of 90 days. In the previous months, several governors had trained their militias. Their troops started to move the next day.
The two countries changed from being friendly allies to being fierce rivals because the Soviet Union was trying to spread communism and the US is a capitalist country.
<u>The answer: President Harry Truman was sworn into office.</u>
Harry Truman was sworn into office as the 33rd U.S. president on April 12th in 1945, following the death of President Franklin Roosevelt. While the two atomic bombs were dropped on Hiroshima and Nagasaki three months later, on August 6 and August 9, respectively, of that same year. Inevitably, Japan announced its surrender to the Allies six days later. And the following month, the war finally ended.
