According to the text, who raised the Army from its scattered fragments and made it whole again?

From the text:

"In the end, it was not the Commanding General - nor any other general, good or bad - who raised the Army from its scattered fragments and made it whole again. Rather it was the corporals, the sergeants suddenly in command of companies, the junior lieutenants and the captains, the field-grade officers who had once been sheriffs and county clerks and cotton planters, the color bearers who planted their battle flags in the rocky fields and sang out the numbers of the numerous regiments: Here is the Fifteenth, here the Forty-third Mississippi..."