Which battle of the civil war was a northern victory and is known as the bloodiest day of the war?

Battle of Gettysburg (although if your teacher is an Office fan, maybe make a joke that the northern most battle was the battle of Shrute Farms :))

Explanation:

the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict