If he is killed in battle, there is great merit in it. Similarly, there is great sin if he flies from the field. It is for this that the life of a Kshatriya is exceedingly hard.
वधे चैव परो धर्मस्तथाधर्मः पलायने। ते स्म घोरां समापन्ना जीविका जीवितार्थिनः॥