History 3 Race relations 2 Black people 1 Frontier and pioneer life 1 Government relations 1 History, Military 1 Indians of North America 1 更多 ... Law enforcement 1 Mexican War, 1846-1848 1 Participation, Black 1 Politics and government 1 Regimental histories 1 Soldiers 1 Territorial expansion 1 Violence 1 少 ...