Title: Ming dai wei suo yu He xi di qu she hui bian qian yan jiu
Subjects: Armed Forces, History, Military policy, Social conditions, Conditions sociales, Histoire
Places: China, Gansu Sheng (China), Gansu (Chine), Chine, Gansu Sheng
Time periods: Ming dynasty, 1368-1644, 1368-1644 (Dynastie des Ming)