On 13 June 1861 the Third Regiment marched out of Cantonment Anderson in Grand Rapids, Michigan towards the recently constructed railroad depot near Leonard and Plainfield streets, where it boarded and departed the area for the war. While attached to Richardson’s brigade of Colonel Miles’s Division, the Third participated in its first engagement against Confederate forces just thirty-eight days after being federalized. It began as a part of a reconnaissance in force towards Blackburn’s Ford along Bull Run (the term "run" is southern for creek or small river). On 21 July, the Third marched with Richardson’s brigade back to Blackburn’s ford to keep the rebels occupied while the rest of McDowell’s army hit the Confederate’s left flank. After desultory firing at the ford, Richardson learned of the Federal rout on the right and was recalled to Centreville. What they saw was utter chaos and confusion as the Confederate forces, now reinforced, literally cut through the advancing and then retreating Union forces.
