The american Revolution was based on a very important principle fought between 1775 and 1783. where does the parentheses go in this sentence?

When using parentheses in a sentence they are there to include information that is not essential to the sentence but is supplementary. If the information in the parentheses were removed, the sentence would still remain the same. The correct way to write this sentence would be "The American Revolution was based on a very important principle (fought between 1775 and 1783).

The sentence would go like this: The American Revolution was (based on a very important principle) fought between 1775 and 1783. Here, the part in parentheses is considered the additional information inserted in the middle of the primary sentence and because of that we used the parentheses there.