छिन्नधान्यपुरुषवीवधयोः छिन्नधान्यमन्यतो धान्यमानीय जङ्गमस्थावराहारं वा युध्येत न छिन्नपुरुषवीवधमनभिसारम् ॥ कZ_०८.५.१४ ॥
chinnadhānyapuruṣavīvadhayoḥ chinnadhānyam anyato dhānyam ānīya jaṅgamasthāvarāhāraṃ vā yudhyeta na chinnapuruṣavīvadham anabhisāram
Between one whose grain supply is cut and one whose men and draft-animals are cut down, one should fight the side whose grain is cut—bringing grain from elsewhere or subsisting on movable and fixed provisions; one should not fight when men and transport-animals are destroyed and relief cannot be brought in.
Food can be substituted via import or foraging; trained manpower and transport capacity are slower to regenerate and directly limit maneuver and relief.