Facts about the Free Soil Party, including dates, participants, the impact, and more interesting details you might not know. This fact sheet provides a quick overview of the coalition of Free Soil Democrats, Barnburners, Conscience Whigs, and members of the Liberty Party that strongly opposed the extension of slavery in the American West during the 1840s and 1850s and is for kids doing research and students preparing for the AP U.S. History (APUSH) exam.