Identify each historical source as a primary source or a secondary source.

You didn't give the source, so the only thing I can do is explain what is each one.

Explanation:

Well, what is a primary source and a secondary source?

Primary source is a data that has not yet had any analysis on it. This information may be from a document, company records, correspondence, and so on. Primary source can be a document, image, or any other source of information. It's a legal source.

Secondary source It is a document, image or recording that discusses or relates information already presented elsewhere.  Unlike the primary source which is the original source of the information. The secondary source is the result of discussions in the primary source material.  Secondary sources involve analyzes, syntheses, discussions and interpretations of the original information.

the answer is c.

i hope this .

c. troops marched forward in close formation against newer, more accurate weapons