पार्श्वतो विषमायामितरतोऽभिहन्यात् ॥ कZ_१०.३.१३ ॥
pārśvato viṣamāyām itarato 'bhihanyāt
When uneven ground lies on one flank, strike from the other side.
Minimize your own movement penalties while maximizing the enemy’s—choose the axis of advance that reduces friction for you and increases it for them.