Both R<span>epublicanism and progressiveness believe in the right to Liberty, Freedom and Free Speech.
Both believe in the power of democracy and government by the people. However, both have actually meant different things in different times.
An example is the deep-seated patriotism of Republicanism and the American exceptionalism. On the other hand progressiveness believe in equality among people from all nations and actually support migrations.
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Answer:
The acquiring of the territories gave the United States justification to send out immigrants into those territories and settle the land along the trails created by traders and trappers beforehand. These immigrants and other workers then set up the Transcontinental Railroad to facilitate trade and transport back and forth from the west coast to the east.
If Americans were aware of the repeal of England's Orders in Council, they may not have gone to war.
