उपजापः योगवामनमपसर्पप्रणिधिः पर्युपासनकर्म अवमर्दः लब्धप्रशमनं इति दुर्गलम्भोपायस्त्रयोदशमधिकरणम् ॥ कZ_०१.१.१५ ॥
upajāpaḥ yogavāmanam apasarpa-praṇidhiḥ paryupāsana-karma avamardaḥ labdha-praśamanaṃ iti durga-lambha-upāyās trayodaśam adhikaraṇam
These are the means for securing (obtaining control of) a fort: sowing dissension, deceptive stratagems, withdrawal and covert placement of agents, surrounding investment and operational measures, assault/pressure, and pacification after acquisition. This constitutes the thirteenth topic-section.
To provide a state toolkit for capturing a fortified position by combining political subversion, operational maneuver, intelligence deployment, coercive force, and post-capture stabilization—maximizing success while reducing prolonged costs and resistance.
It parallels modern campaign design: shaping the environment (information and influence), using intelligence assets, applying containment and decisive force when required, and prioritizing stabilization after takeover (law-and-order, services, and legitimacy) to prevent insurgency or relapse.
The implied duty is to direct a sequenced strategy: employ agents to create fractures and gather actionable intelligence, choose appropriate operational measures (encirclement, maneuver, assault), and then pacify and administer the acquired fort to secure durable control and public order.