Juvenile literature 23 History 15 Social life and customs 5 African Americans 2 Biography 2 Causes 2 Concord, Battle of, Concord, Mass., 1775 2 Lexington, Battle of, Lexington, Mass., 1775 2 Women 2 World War, 1939-1945 2 Aerial operations, American 1 African American soldiers 1 African American troops 1 Arapaho Indians 1 Assassination 1 Boston Massacre, 1770 1 Chumash Indians 1 Constitutional history 1 Creek Indians 1 Frontier and pioneer life 1 Homes and haunts 1 Mexican War, 1846-1848 1 Minutemen (Militia) 1 Ojibwa Indians 1 Participation, African American 1 Pearl Harbor (Hawaii), Attack on, 1941 1 Pilgrims (New Plymouth Colony) 1 Politics and government 1 Reconstruction (U.S. history, 1865-1877) 1 Trials (Witchcraft) 1