Allah's Strategy
Allah showed them to you in your dream as few. Had He shown them as many, you would have faltered and disputed in the matter. But Allah saved you, He knows what is within hearts.
8:43When Allah showed them unto thee (O Muhammad) in thy dream as few in number, and if He had shown them to thee as many, ye (Muslims) would have faltered and would have quarrelled over the affair. But Allah saved (you). Lo! He knoweth what is in the breasts (of men).