Napoleonic Broadsides
The broadside is the historical precursor to today's poster. Typically printed on one side of a large sheet of paper, the format was designed to be visible and posted in town squares, taverns, churches, or other public venues. While a wide range of content could be printed on a broadside, it was most commonly used to announce news and events, official proclamations, advertise, or advocate political and social causes.
The threatened invasion of England by Napoleon inspired a flurry of broadsides that ranged from satires to songs to calls for volunteers to defend coastlines to actual plans of evacuation in the event of a French invasion.