ततः सत्त्रिभिरमित्राद्भेदयित्वा मित्रं लभेत ॥ कZ_०९.६.१५ ॥
tataḥ sattribhir amitrād bhedayitvā mitraṃ labheta
Then, by using secret agents, having sown division within the enemy’s side, he should secure a friend (ally).
He treats alliance-building as an outcome of engineered fractures in the adversary camp—spies create dissension, enabling defections or new partnerships.