परस्परसाधका हि शक्तिदेशकालाः ॥ कZ_०९.१.३३ ॥
parasparasādhakā hi śakti-deśa-kālāḥ
For power (resources), place (terrain), and time (season) mutually enable one another (and must be assessed together).
Do not decide on war by strength alone; align resources with terrain and season so each factor amplifies the others.