Harry S. Truman made the decision to use the atomic bomb against Japan.
Japan rejected the offer to surrender, so on August 6, 1945, Enola Gay (a plane) on a city in Japan, killing over 100,000 people. The Japanese soon surrendered a week later.
If you're talking about U. S. A then 44 presidents
They were successful because their goal was to get rid of slavery and have the union win the civil war. They were able to get the 13th amendment passed (with the bribery of some Democrats) and win the civil war in four years.
