After the First Battle of Bull Run, Barton placed an ad in a Massachusetts newspaper for supplies; the response was a profound influx of supplies. She worked to distribute stores, clean field hospitals, apply dressings, and serve food to wounded soldiers in close proximity to several battles, including Cedar Mountain, Second Bull Run, Antietam, and Fredericksburg. Barton helped both Union and Confederate soldiers. Supplies were not always readily available though. At the battle of Antietam, for example, Barton used corn-husks in place of bandages.