Fortification 1 History 1 Law partnerships—Pennsylvania—Philadelphia—20th century 1 Military education—United States—20th century 1 Military training camps—United States—20th century 1 Mourning customs—20th century 1 Soldiers--Pennsylvania--Philadelphia--20th century 1 more ... Soldiers—Diaries—20th century 1 War widows—Pennsylvania—20th century 1 World War, 1914-1918—Campaigns—France 1 World War, 1914-1918—Personal narratives 1 less ...