भेदयेद्भिन्नमुच्छिन्द्यात्ततः शत्रुमनन्तरम् ॥ कZ_०७.१८.३६च्द् ॥
bhedayed bhinnam ucchindyāt tataḥ śatrum anantaram
He should create a split; having split them, he should cut off (destroy) the separated part; then, immediately thereafter, the enemy.
Division is only useful if followed by swift neutralization of the separated element and then quick pressure on the main enemy before reunification.