The Art of War by Sun Tzu

I Laying plans contd...

[Earth- number three of the five constant factors to be taken into account in one's deliberations, when seeking to determine the conditions obtaining in the field]

8. Earth comprises distances, great and small; danger and security; open ground and narrow passes; the chances of life and death.

Notes by Zephyrist:

Where you choose to make a stand can determine a battle. Always force the enemy to choose your battlefield and try not to get stuck with the enemies choice of battlefield. A really simple example is the home turf advantage, make the enemy come to you so they are unfamiliar with your territory.