<span> was a field </span>army of<span> the French </span>Army<span> stationed on the </span>Italian<span>border and used for operations in </span>Italy<span> itself. Though it existed in some form in the 16th century through to the present, it is </span>best<span> known for its role during the French Revolutionary Wars</span>
The correct answer to this open question is the following.
Although the question is incomplete because it does not provide a specific reference about the author of the letter or any other reference, we can comment on the following.
A primary source is the piece of information that was written by a character or an individual that lived in the moment of the event, was part of the event, or witnessed the event. This individual could have written a letter, or a document -including a book. Or he/she took a photograph. Or was part of an interview. The secondary source includes information from a third person who was not part of the time or event but has found information through other resources. It is the case of an encyclopedia or researchers/historian books.
It protects someone from being compelled to be o witness against himself in a criminal case
It was the "Chinese Exclusion Act" of 1882 that excluded an entire ethnic group from immigrating to the United States, partly because of economic fears but also because of blatant racism.