The policies of containment used during the Cold War (which were the Truman Doctrine and the Eisenhower Doctrine) both used the economy to help out other countries to stop the spread of communism. The Eisenhower Doctrine in addition used military forces.
The Bush Doctrine is different because it actually tried to implement democracy into other countries (such as the middle east) in an attempt to stabilize the government.
In general, this statement is true in the sense that Truman was a pragmatic leader. He of course came into office because of FDR's death, so he had great shoes to fill. Yet he did so with great poise.
As the first peaceful transition of political power between opposing parties in U.S. history, however, the election of 1800 had far-reaching significance. Jefferson appreciated the momentous change and his inaugural address called for reconciliation by declaring that, "We are all Republicans, we are all Federalists."
For more info http://www.ushistory.org/us/20a.asp
. The Majority of the states didn't have any government. They were controlled by the Northern army and they were divided into different military districts. The only state who was readmitted was Tennessee.
The Army was there to uphold the emancipation proclamation and prevent the South from trying to start another war.