Energy, Government, and Defense magazines
- Painters and Patriotism, Late Eighteenth and Early Nineteenth Centuries
- Peace Movements, 1898–1945
- Peace Movements, 1946–Present
- Peace of Paris, 1763
- Pearl Harbor Investigation
- Photography, Civil War
- Photography, World War I
- Photography, World War II
- Photojournalism
- Pirates and the Barbary War
- Politics and Elections
- Politics and Expressions of Patriotism
- Poor Relief, 1816–1900
- Popular Culture and Cold War
- POW, MIA
- Preemptive War
- Preventive War
- Primary Source Documents
- Primary Source Documents
- Primary Source Documents