1. God created angels before He created the universe. Job 38 speaks about the angels shouting for joy when God created the heavens and the earth.
Job 38
1Then the Lord answered Job out of the storm. He said:
2“Who is this that darkens my counsel
with words without knowledge?
3Brace yourself like a man;
I will question you,
and you shall answer me.
4“Where were you when I laid the earth’s foundation?
Tell me, if you understand.
5Who marked off its dimensions? Surely you know!
Who stretched a measuring line across it?
6On what were its footings set,
or who laid its cornerstone—
7while the morning stars sang together
and all the angelsa shouted for joy?
2. God doesn't need an army. He is the beginning and the end. He needs nothing to sustain His being.
"I am Alpha and Omega, the beginning and the end, the first and the last." Revelation 22:13
3. I don't know if there is an "angel bible", but there are books in heaven.
4. Well there are only 3 worlds which mankind knows about. This universe, heaven, and hades. Wars exist in these places because of the sin and rebellion which exists in the hearts of mankind and demons.
5. God doesn't need protection. The word Angel means messenger. They act on behalf of God. If God needed protection, that would mean that He wouldn't be the Al-Mighty. No one can defeat God. Many people will find out this harsh reality on the last day.