The designers and researchers gathered up historical information on civilizations in books found in the children's section of a local community library. This was because the information on the civilizations was much more boarder and easy to explain for a big audience and also because the designers wanted to avoid the experience of the game from becoming more of a historical simulation, if the information were from in-depth historical books or encyclopaedia. . This technique can also build more units than you have houses for. . .
. . . . .
. . . . .
. . . . .
. . . . .
. . . . . . .
. . . . .
. . . . . .
. . . . .