Book IX is a treatise on the "Actions of an Invader<nowiki>''</nowiki>. This book stresses on revolts and enemy invasion and the associated preparations and preparedness required to mitigate or combat such dangers and uncertainty.
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Book IX is a treatise on the "Actions of an Invader<nowiki>''</nowiki>. This book stresses on revolts and enemy invasion and the associated preparations and preparedness required to mitigate or combat such dangers and uncertainty. It is crucial for the state and king to have शक्तिदेशकालबलाबलज्ञानं i.e. the knowledge of one's power, place, time, strength and weakness. This is to be complemented with other infrastructure such as arrangement of armoury and equipment keeping the strength of the enemy force in mind. A prepared mind is half battle won as it is said is aptly described in the book. It is important to ascertain internal and external dangers and guard against people associated with traitors and enemies. There is also a parallel need to consider the income, expenditures, losses and gains accruing from the acts of combating such situations.