Satan declared war on God when he attempted to overthrow God long before Adam and Eve were here. We believe Satan whose name was Lucifer lived on the planet Earth ruling over all of God's angels. There was plant and animal life plus all of God's angels. Lucifer planned an invasion of heaven taking a third of God's angels with him.
Isaiah the prophet tells us, "How art thou fallen from heaven, O Lucifer, son of the morning! How art thou cut down to the ground, which didst weaken the nations! For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: I will ascend above the heights of the clouds; I will be like the most High (Isaiah 14:12-14)."
