The Libbie Printing Company in Boston designed and produced this dynamic scene of a British Mark I tank attacking German soldiers fleeing from trenches with airplanes flying overhead. The poster advertised the National Allied Bazaar held in Boston in 1916 to raise funds for relief, before America officially entered the war. The tank was developed precisely for trench warfare, which had become an intractable element of World War I (see no. 15). The company printed a range of items, including sheet music, broadsides, calendars, and, like many American and British printing companies, it designed and printed posters.