Разделиться is okay when we're talking about military troops or whatever, like to split up a group of people into several groups or individual persons in order to investigate a large area or attack someone from both front and rear simultaneously, or flank them. For any purpose, actually, like to divide a platoon or class into two parts to form basketball/football teams.
Разделитесь на две команды.
Нам нужно разделиться. Так мы быстрее найдем схрон.
Взвод, не разделяемся, иначе они уничтожат нас поодиночке...