There are different kinds of terrain in nature. Some terrain is easily accessible, some is entrapping, some temporizing, some constricted, some precipitous and some distant.What terrain is accessible? Ground that is easy for both your troops and the enemy’s to move across is called accessible terrain. If you enter the accessible region, you should first take high and sunny positions and keep your supply routes unimpeded. This is convenient for you to fight with the enemy.
– Sun Tzu