Divide and conquer

Tradition attributes the origin of the motto to Philip II of Macedon: Ancient Greek: διαίρει καὶ βασίλευε diaírei kài basíleue, meaning "divide and rule"

The term divide and conquer in politics refers to an entity gaining and maintaining political power by using divisive measures. This includes the exploitation of existing divisions within a political group by its political opponents, and also the deliberate creation or strengthening of such divisions.