Arena

When the fires started, the soldiers came in.
They were dressed in black and white, holding guns, swords, and blasters. They cut the buildings down and bombed the town.
They captured the children and slaughtered the adults. The teenagers were left to fend for themselves.
100 years later, a giant arena built high was where the town used to stand. The old town's children's grandchildren were soldiers.
The teenager's descendants were criminals, but that all changed when brother turned on brother, friends turned on friends, and the soldiers came into the other towns. Not to bomb them, but to start a war.