Chapter 9 - The Army on the March | The Art of War by Sun Tzu

1. Sun Tzu said: We come now to the question of encamping the army, and observing signs of the enemy. Pass quickly over mountains, and keep in the neighbourhood of valleys.

Al Capone chose not to hide from the media and made many public appearances, rather than hiding in the criminal underworld. His celebrity status made him a high-visibility target for prosecutors, which eventually led to his arrest and imprisonment.

Avoid high places where you can be trapped and spotted from multiple other locations. Valleys offer more space in which to manoeuvre.

2. After crossing a river, you should get far away from it.

Battle of Tettenhall, England, 910

In the Battle of Tettenhall, Anglo Saxon kingdoms took on the Vikings, who had travelled up a river to take revenge for an earlier attack. The river took the Vikings deep into the Anglo Saxon heartland. They ravaged the land, but they were later caught and stopped from returning. Trapped in hostile territory lead to the death of some Viking kings and thousands of their men.

Avoid any boundaries that are difficult to cross easily as it is easy to become hemmed in. Use boundaries for defensive purposes, if rivals struggle to cross them.