The Fall of Adam-The Garden of Eden
Good theology would tell us that God set the scenario so they would fall to fulfill his eternal purposes. Their dying brought the miracle of the resurrection. The world exists as it does because God wanted it to, not because Adam and Eve wanted it to. He is the one with all knowledge and designs the purpose for which things exist and the condition in which they exist as they pertain to truths about salvation.
We are given power over Satan and his hosts through faith in Christ. He will be overcome and cast to his final prison in the end. It will be done in the same manner as the pre-earth war. "And they overcame him by the blood of the Lamb, and by the word of their testimony". Revelation 12:11