It is known that maps in Age of Empires III don't differ in especially big sizes. Modification of Larger Maps eliminates this annoying defect. After its installation accidental maps (Random Maps) will become three times more. After that to your armies there will be a lot of place for maneuvre and you will be able to embody more difficult strategic intentions on fields of battles.
Attention! This modification is set on game, pached to version 1.01.
Copy the RM folder in the principal directory of game.