The kings and the commanders were to stand in the front of the fighting soldiers. That was the system of actual fighting. The kings and commanders were not so-called presidents or ministers of defense as they are today. They would not stay home while the poor soldiers or mercenaries were fighting face to face. This may be the regulation of modern democracy, but when actual monarchy was prevailing, the monarchs were not cowards elected without consideration of qualification.

Srila Prabhupada, SB 1.9.36, Purport