He changed the cause of the war to a moral issue. Before the civil war was fought mainly for states rights but when the Emancipation Proclamation was issued freeing slaves the war became a moral issue therefore prohibiting Britain from supporting the Confederacy because they recently freed their own slaves and did not support slavery.
do it yo self you aaint even smart kid go kill yo self
The main argument in support of the decision to use the atomic bomb is that it saved American lives which would otherwise have been lost in two D-Day-style land invasions of the main islands of the Japanese homeland