प्रभूतं मे शत्रुबलं शत्रुबलेन योधयिष्यामि नगरस्थानमटवीं वा तत्र मे श्ववराहयोः कलहे चण्डालस्येवान्यतरसिद्धिर्भविष्यतिण् आसाराणामटवीनां वा कण्टकमर्दनमेतत्करिष्यामिण् अत्युपचितं वा कोपभयान्नित्यमासन्नमरिबलं वासयेदन्यत्राभ्यन्तरकोपशङ्कायाः शत्रुयुद्धावरयुद्धकालश्च इत्यमित्रबलकालः ॥ कZ_०९.२.०६ ॥
prabhūtaṃ me śatrubalaṃ śatrubalena yodhayiṣyāmi nagarasthānam aṭavīṃ vā; tatra me śvavarāhayoḥ kalahe caṇḍālasya ivānyatarasiddhir bhaviṣyati; āsārāṇām aṭavīnāṃ vā kaṇṭakamardanam etat kariṣyāmi; atyupacitaṃ vā kopabhayān nityam āsannam aribalaṃ vāsayed anyatrābhyantarakopaśaṅkāyāḥ; śatruyuddhāvarayuddhakālaś ca—iti amitrabalakālaḥ
When I have abundant enemy forces available to be turned and used, I shall fight by means of the enemy’s own forces—whether in a fortified town or in forest terrain; there, as in a fight between a dog and a boar, a low agent (like a caṇḍāla) gains success whichever side wins. Thus I will accomplish the crushing of “thorns”—assaults and forest obstacles. Also, if the hostile force has grown excessively, then out of fear of provoking its anger I should quarter that enemy force elsewhere, since keeping it constantly near risks internal revolt. This is the occasion for enemy-war and proxy-war—i.e., the use of enemy forces.
Let rival forces exhaust each other; a third party can secure advantage regardless of which side prevails, provided it manages timing and positioning.
To prevent a nearby, concentrated hostile contingent from turning into an internal coup or revolt risk.