What is it you need exactly?
The significanes of the battle was the confedrate and union where fighting during the civil war.Also,involed the largest casualites.
Answer:
you could talk about how the romans made art of "indescribable beauty", or how they invented concrete, or their irrigation systems, they helped mold wrestling into a combat system still seen today, etc.
Explanation:
also you could point out that they have one of the biggest impacts on the most popular religion in the world.