Sidney Lanier’s poems about the mountains of Georgia are landmarks in American region literature.?
The sentence was not correct, so I modified that one become

1. Sidney Lanier’s poems about the mountains of Georgia are landmarks in the literature of the region in America.
2. Sidney Lanier’s poems about the mountains of Georgia are landmarks in American region of literature.

Can you correct the sentence?

Question

Sidney Lanier’s poems about the mountains of Georgia are landmarks in American region literature.?
The sentence was not correct, so I modified that one become

1. Sidney Lanier’s poems about the mountains of Georgia are landmarks in the literature of the region in America.  
2. Sidney Lanier’s poems about the mountains of Georgia are landmarks in American region of literature.

Can you correct the sentence?

Answer

The first sentence is correct. The definite article "the" should be used because the references are specific.