Don larson in 1956 i think
<span>The Peloponnesian war differ from earlier conflicts in Greece </span>like the Persian Wars because there was no outside conflict.
More info:
The Peloponnesian war was a war fought between the Delian League, led by Athens, and the Peloponnesian League, led by Sparta. It was different from other conflicts like the Persian Wars because there was no outside conflict. It was a conflict between the two Greek "Superpowers" and they both felt like it was necessary to gain an edge over the other. After fighting this war, Sparta was victorious. However, it left the entirety of Greece weak. Philip II of Macedonia took advantage of this, and conquered Greece.
Answer:
A secondary source is any source about an event, period, or issue in history that was produced after that event, period or issue has passed.
Explanation:
Aside from a textbook, the most commonly assigned secondary source is a scholarly monograph - a volume on a specific subject in the past, written by an expert.Secondary sources describe, summarize, or discuss information or details originally presented in another source; meaning the author, in most cases, did not participate in the event. ... Examples of a secondary source are: Publications such as textbooks, magazine articles, book reviews, commentaries, encyclopedias, almanacs.
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