How do those enemies look like? How much of which type of enemy comes in my city?
These questions are answered on this page.
The 3 (or 2) pictures represent the enemies: the first picture is the first type of soldiers that come in your city, always the heavy armored spearmen or hoplites. After them come the archers/rabble, and after the archers come the cavalry.
The row with the numbers shows the percent of which type come in your city.
For example, if there are 20 Greek soldiers attacking you, there'll be 20 * 60% = 12 hoplites, 4 horsemen and 4 rabble.
If the numbers aren't whole, the game rounds them down to the nearest whole number.
Egyptians, Mayans, Phoenicians, Oceanids and Atlanteans only appear in Poseidon.