War History

You said your father is angel Uriel but

I heard that angels can't engage themselves in earthly pleasures. Including the relationship between man and woman, then how they can give birth." 

"Hmm a good question." He said. 

"So there's a long story, want to hear?" He asked. Anna nodded her head vigorously.

"So a long long time ago before my birth a fight Broke between angels and demons. Lucifer was the king of hell at that time. For a long time angels were trying to defeat him but he was very powerful and had very powerful demons by his side which were almost invisible. But at that time something strange happened and during the war Lucifer fell. And with his death all other demons became weak and demons lost the fight and Angels won.

But the demons weren't lost in all aspects. During the time of war so many Angels were killed too." 

"Looks like the demons gave a tough fight." Anna commented in the middle.