@Weeeb He is not a warrior, he is a commander. Commanders need a cool head and analyze things rationally. Him sending soldiers to possible deaths for uncertain gains is reckless.
One important thing Arthur has been lacking since beginning of the war is a good strategist. Arthur is a good leader but he needs someone to think and plan ahead for the army and use the lances more strategically.
One important thing Arthur has been lacking since beginning of the war is a good strategist. Arthur is a good leader but he needs someone to think and plan ahead for the army and use the lances more strategically.