How did the peloponnesian war differ from earlier conflicts in greece? a. sparta and athens found themselves on opposite sides. b. it was the first time greek poleis had formed alliances. c. earlier wars were all against foreign invasions. d. it was ultimately more divisive and destructive.

Hey there!

Sparta and Athens were usually on opposite sides. That's why it was such a surprise when they decided to work together to fight the Persians. Many alliances were created in Greece as well. 

Therefore, your answer is D. This war divided Greece and allowed the Macedonians to take over.

Hope this helps!