Armies are the most important factor in assessing the relative power of a nation. But how do we judge which armies were the most powerful in their time? By their ability to win battles decisively and consistently and the extent to which they allowed their countries to dominate other states—a function of land power, as only armies could achieve this type of control and conquest. Here are some of the most powerful armies in history.
http://www.scout.com/military/warrior/story/1740602-6-most-powerful-armies-of-all-time
