To explore the Louisiana territory.
and
To establish a route across the continent.
The Netherlands, Luxembourg, Poland, Austria, Belgium basically all countries surrounding Germany
Congress thought President Lincoln was being to sincere and forgiving toward the Confederate side of the US (remember that they seceded from the Union and formed their own goverment which started the American Civil War).
At 1950s it was different then today today we have many things at 1950s they didn't have many things they didn't have cars things were different then today today it's change it's not 1950s