How did the Pandavas fight with Bhishma? O Sanjaya, how is it that Bhishma could not conquer when Drona is still alive.
कथं भीष्मेण संग्रामं प्राकुर्वन् पाण्डुनन्दनाः। कथं च नाजयद् भीष्मो द्रोणे जीवति संजय॥