Answer:
When European settlers arrived on the North American continent at the end of the fifteenth century, they encountered diverse Native American cultures—as many as 900,000 inhabitants with over 300 different languages. These people, whose ancestors crossed the land bridge from Asia in what may be considered the first North American immigration, were virtually destroyed by the subsequent immigration that created the United States.
I think that the colonists split from England because their freedom was diminished, I believe that the colonists also wanted spiritual freedom and social freedom, also England was pretty crowded and loaded with disease. After the revolution, they did receive what they wanted.
Disagreements between the two formed early divisions within the government regarding policies on economics. They became the foundation for political parties as Hamilton wanted to have high trade tariffs and a centralized bank (Bank of the United States) and Jefferson wanted to concentrate on what would be good for the common man (the policies of the Democrat-Republicans).
The answer you are looking for is
Democratic Republic of Congo: which gained its independence in 1960
Ghana: which gained its independence 1957
Nigeria: which gained its independence 1960
Hope this helped :D
