北バージニア方面作戦
After the Department of Pennsylvania was merged with the Department of the Potomac in August 1861, Crosman served as quartermaster for units in the field, most notably as quartermaster for the V Corps and later the II Corps in the spring and summer of 1862. Crosman coordinated supplies to these units, consisting of thousands of soldiers, during their involvement in the Peninsular Campaign and the Northern Virginia Campaign.