"'But the prince of the Persian kingdom resisted me twenty-one days. Then Michael, one of the chief princes, came to help me, because I was detained there with the king of Persia.'" NIV translation
The angel explains his delay in coming and we see the battle was raging between a demon in Persia and the angel of God. We also see that their are ranks of angels as Michael is referred to as a "chief prince" or archangel. The word for "prince" refers to rulers and we see that certain angels are sent to different areas and groups of people. We might ask the question: Why did the demons want to stop the angel from getting to Daniel? The answer is simple in the fact that Satan did not want the knowledge of the last days to get out. The devil did not want Daniel (or us) to know that he has already been defeated and so we can rejoice. He was defeated when he was thrown out of heaven and he was defeated again when Jesus went to the cross and rose from the dead.
"'Now I have come to explain to you what will happen to your people in the future, for the vision concerns a time yet to come.'" NIV translation
The angel continues by explaining that the vision was about future events. As we shall see, the vision told of the time of persecution at the hands of Antiocus Epiphanes and also the events of the last days.
"While he was saying this to me, I bowed with my face toward the ground and was speechless. Then one who looked like a man touched my lips, and I opened my mouth and began to speak. I said to the one standing before me, 'I am overcome with anguish because of the vision, my lord, and I am helpless. How can I, your servant, talk with you, my lord? My strength is gone and I can hardly breathe.'" NIV translation
Once again, Daniel's reaction was to bow and this time he was touched by the hand of a man. This shows us the position of men in the order of battle. We were created in the image of God but a little lower than the angels. We do not become angels when we die and our dead relatives are not angels watching over us.