The 4th scene of my own fiction ：The female dragon told the little Unicorn a long story about the dragons history 。

long time ago， the dragons and other creatures together living on the earth ，but because of an accident ，The fuse of the war is ignited .

The dragon don't like violence ，but they can't stop the war ，So they are volunteered to Sacrifice their freedom in exchange for peace 。
They settled in a new place and other creatures used magic to separate that place from the outside . then the War Is Over ...