Greek against Greek

When looking at Greek pottery did ever notice the soldiers look oddly similar to each other. That's because The Peloponnesian War involved Athens vs. Sparta - both Grecians. Surviving artifacts show brother against brother, not distant warring nations. To understand fully the rivalry between the Spartan vs the Athenians you'd have to dive deep into Greece city-state politics and history. However, clashing cultures and ideologies is not foreign to our modern-day events. 

Can you think of a moment in our American history when it was brother against brother? You might say the Civil War and you'd be right but, you would not have to travel so far back in time to find brother against brother if you consider the current state of racial affairs.