These are the 13 colonies
<span>Isolationism tends to be borne out of a sense of nativism: that is, the idea that we are the best country among others tends to make us wary of wanting to help other nations. In the '20s, this idea that we shouldn't entangle ourselves in the arguments of other nations led to the US taking an isolationist stance on world diplomatic matters.</span>
The answer is d hope this helps
Responding to xenophobic concerns, Congress passed an emergency law restricting immigration in 1921. Among other provisions, the Act established a quota (a proportional share of a total) for nationalities on the basis of their numbers in the U.S. in 1910.
The missing detail is: a quota.
The United States finally decided to join the World War I on side of the Allies mainly because of the following 2 reasons:
* The first one was the proposal made to Mexico in order to join the war against the allies, which meant the war was getting closer to American land.
* The second one was the German submarine attacks on American merchant ships.
After these two events took place, Woodrow Wilson the American president at the time talked to the Congress and requested it to declare war on Germany. And finally the Congress declared the war on April 6th, 1917.
