From Wikipedia, the free encyclopedia.
The Book of Five Rings (Go Rin No Sho) was written by Miyamoto Musashi. It is considered a classic treatise on military strategy, much like Sun Tzu's The Art of War.
The five rings are Ground, Water, Fire, Wind and the Void. Each ring represents a different aspect of strategy, and by mastering all five rings, you make yourself invincible in combat.
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