Question

When do you capitalize nation? When referring to the US, for example "the nation's greatest accomplishment"

Would you capitalize it??

Answer 1

No, you would not capitalize the word "nation." It is only referring to a country/nation, but it is not the country's name.

For example, you would capitalize the name Sarah, but you would not capitalize the word "she" when referring to Sarah. This is the same concept with the word "nation."