divide and conquer

:  to separate into two or more parts, areas, or groups

:  to separate into classes, categories, or divisions

:  cleave, part

:  an act of dividing

:  a dividing ridge between drainage areas

:  a point or line of division or disagreement

:  to gain or acquire by force of arms :  subjugate

:  to overcome by force of arms :  vanquish

:  to gain mastery over or win by overcoming obstacles or opposition