It's hard, but you're up for the job, provided you know your stuff. Why, your people, your military units, and towers, of course. A good command of your army requires a solid understanding of your units and how to use them effectively. There is a lot of timeless strategy in warfare that dates back, well, to the ages in this game. Infantry are often put on the frontline, backed by archers.
Cavalry are fast but vulnerable in their own way.
And a strong navy to dominate the sea is often key to success on land. Here are all the units you'll control in Age of Empires, and tips to help you use them efficiently and effectively.