Soldiers History 110 World War, 1914-1918 29 World War, 1939-1945 25 Campaigns 20 Vietnam War, 1961-1975 20 Armed Forces 16 more ... Psychological aspects 13 Social aspects 13 Military life 12 History, Military 11 Social conditions 11 Veterans 11 Psychology 10 War 10 Education, Non-military 9 Politics and government 8 Mental health 7 Participation, African American 7 Health and hygiene 6 Iraq War, 2003-2011 6 Medical care 6 Regimental histories 6 Families 5 History and criticism 5 Moral and ethical aspects 5 Religious life 5 Sociology, Military 5 Women soldiers 5 Attitudes 4 less ...