World War, 1939-1945 28 Vietnam War, 1961-1975 23 History 12 Soldiers 8 Campaigns 7 Medical care 4 Forced removal and internment, 1942-1945 3 more ... Japanese Americans 3 Veterans 3 War 3 World War, 1914-1918 3 African Americans 2 Americans 2 Authors, American 2 Childhood and youth 2 Concentration camps 2 Counterinsurgency 2 Description and travel 2 Generals 2 Journalists 2 Marines 2 Participation, Female 2 Prisoners and prisons, North Vietnamese 2 Prisoners of war 2 Travel 2 Underground movements 2 War correspondents 2 Women soldiers 2 Aerial operations, American 1 Afghan War, 2001-2021 1 less ...