Filter Results Refine these results by: Category: History United States Military Native American Social History General History Europe Modern Expeditions & Discoveries African American Women World Maritime History & Piracy North America Middle East Study & Teaching Historical Geography Historiography Jewish Revolutionary Holocaust LGBTQ+ Wars & Conflicts Americas Asia Caribbean & West Indies Latin America Africa Russia & the Former Soviet Union Canada Oceania Reference Essays Civilization Medieval Ancient Polar Regions Australia & New Zealand Audio Length Less Than 1 Hour 1 to 3 Hours 3 to 6 Hours 6 to 10 Hours 10 to 20 Hours More than 20 Hours