Answer:
patriotic assimilation.
Step-by-step explanation:
Historians call it "Patriotic assimilation".
As people that came from different backgrounds meet with the Americans, they are accepted into America.
Patriotic assimilation happens when someone adopts the American civic values and heritage as his own and accepted .
It is a vision that was formulated by American leaders. It was available during the time of George Washington, Theodore Roosevelt, etc.