This chromolithograph by artist John L. Magee shows a group of civilians gathered near a large flagpole watching a regiment drill in front of tents at “Camp Union,” the camp near East Falls, Philadelphia. Civilians include men and women on horseback, women in a carriage, a family with their pet dog, and a child playing with a hoop. A military band is seen leading the troops. Officers ride on horseback, while other civilians walk the tree-lined circumference of the camp. The names of the "Committee of the Corn Exchange Regiment" are printed under the image. The exchange raised an infantry regiment of 1,000 men during the summer of 1862 by offering an enticing, liberal bounty. This illustration was published by Boell & Magee, lithographers William Boell (also seen as William Buell) and John L. Magee. Magee, who is identified as the artist of this print, was born in New York circa 1820; he specialized in cartoons and event prints. Active in Philadelphia by 1855, he produced portraits, church views, political cartoons, and event prints, including Civil War imagery. Boell was born in France around 1832; he worked in New York from 1854 until about 1859. He then moved to Philadelphia where he established his own firm and was active until the 1880s. His work included book illustrations, advertisements, church views, bird's-eye views, political cartoons, and Civil War prints.