...ut Rousseau's flank was for a time as much exposed as Crittenden's had been, as there was still a wide space between the two armies. Before, however, the enemy could take advantage of this exposure Kirk 's brigade reached the field, and was placed in reserve on the right flank. Each brigade of Buell's army was now required to furnish its reserves, while Boyle's brigade of Crittenden's division was ...