राजव्यञ्जनो व्यूहाधिष्ठानमायोज्यः ॥ कZ_१०.३.४२ ॥
rājavyañjano vyūhādhiṣṭhānam āyojyaḥ
The king—bearing the insignia of royalty—should be positioned/assigned as the command-seat of the battle formation.
Visibility stabilizes the formation: troops orient around a recognized sovereign marker, improving coordination and morale while reducing confusion and rumor.