In the last two studies, we saw that there are very real unseen enemies and a battle in which we are engaged, whether we realize it or not. If you know neither the enemy nor yourself, you will succumb in every battle.” If that is true of earthly wars, even more so is it true of the spiritual fight that every Christian is involved. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. In the book, The Art of War, written by Sun Tzu, he said, “If you know your enemy and you know yourself, you need not fear the results of a hundred battles. We need to know who the enemy is and his schemes if we are to be successful in the fight against him. In this study, we will take a closer look at Satan and the demonic forces against which the Church is waging war. Please advise immediately who we are at war with.' When World War One broke out, the War Ministry in London, England, sent a coded message to one of the British outposts in the inaccessible areas of British controlled Africa, saying, 'War declared, arrest all enemy aliens in your district.' The prompt reply came back, 'Have arrested ten Germans, six Belgians, four Frenchmen, two Italians, three Austrians, and an American.