मित्रहिरण्ये हि भूमिलाभाद्भवत इत्युक्तं पुरस्ताद् ॥ कZ_०७.९.३३ ॥
mitra-hiraṇye hi bhūmi-lābhād bhavata ity uktaṃ purastāt
For it was stated earlier that territorial gain arises from (the combination of) an ally and the treasury.
Expansion is not purely military; it requires external support (alliances) and internal capacity (funding) to sustain campaigns and administer acquisitions.