The first revenue stamps in the United States were used briefly during colonial times, among the most notable usage involved the Stamp Act. Long after independence, the first revenue stamps printed by the United States government were issued in the midst of the American Civil War, prompted by the urgent need to raise revenue to pay for the great costs it incurred. After the war ended however, revenue stamps and the taxes they represented still continued. Revenue stamps served to pay tax duties on items that came under two main categories, Proprietary and Documentary. Proprietary stamps paid tax duties on goods like alcohol and tobacco, and were also used for various services, while Documentary stamps paid duties on legal documents, mortgage deeds, stocks and a fair number of other legal dealings. Proprietary and Documentary stamps often bore these respective designations, while in several of the issues they shared the same designs, sometimes with minor variations. Beginning in 1862 the first revenue stamps were issued, and would continue to be used for another hundred years and more. For the first twelve years George Washington was the only subject featured on U.S. revenue stamps, when in 1875 an allegorical figure of Liberty finally appeared. Revenue stamps were printed in many varieties and denominations and are widely sought after by collectors and historians. Revenue stamps were finally discontinued on December 31, 1967.