You should know the ground realities. Bonhomie and feeling of brotherhood in the camp lifts the fighting spirit.
Pandavas: Pandavas knew their ground realities. They knew their strengths and weaknesses. There was great bonhomie and sense of brotherhood amongst the members of the Pandava camp as they had met people from all strata of life during their Vanvasa.
Kauravas: Kauravas: Kauravas were brought up in palaces in the lap of luxury, power and pride. They never stayed or connected with the common man. Due to their overconfidence they could never focus on their weaknesses