परावापात्प्रत्यावापाच्च चतुर्गुणादाष्टगुणादिति वा विभवतः सैन्यानामावापः ॥ कZ_१०.५.२९ ॥
parāvāpāt pratyāvāpāc ca caturguṇād āṣṭaguṇād iti vā vibhavataḥ sainyānām āvāpaḥ
From parāvāpa and from pratyāvāpa, the apportionment of forces is (to be made) fourfold to eightfold, according to resources/capacity.
A standardized scaling rule: force allocation should expand within a defined band (4–8×) depending on available resources and the operational method (parāvāpa/pratyāvāpa).
Kautilya anchors military ambition to fiscal and logistical capacity, preventing overextension.