The gaze should be large and broad. This is the twofold gaze "Perception and Sight". Perception is strong and sight weak.
In strategy it is important to see distant things as if they were close and to take a distanced view of close things. It is important in strategy to know the enemy's sword and not to be distracted by insignificant movements of his sword. You must study this. The gaze is the same for single combat and for large-scale combat.

Go Rin No Sho (1645) - The Water Book