The main change is the countries the immigrants were coming from. The immigrants in 1840s were coming from the Western Europe mainly Ireland and Germany. Immigrants from Asia and Eastern Europe were coming a bit later while during the beginning of the 20th century most of the immigrants came from Italy.
If you study the declaration of independence closely, it us
clear that the declaration demands rights. And the oppressive regimes of the
world would be unwilling to grant those rights. In order to achieve those rights,
one will have to fight. And that will pave the way for war. It has become
evident now after centuries. United States believed in the rights and freedom
of the people. That had the U.S entering the world wars. All the wars after
that too, were basically based on this very idea. FREEDOM.
Answer:
Dwight Eisenhower was Allied Expeditionary Force Supreme Commander.
Hope this helped you.
To the current date, Uranus is believe to have rings made of Dust.