General Wu: Eighty Years of Longyou Great Wall

Historical background Time span: The Jingkang Revolution in 1127 to the Kaixi Northern Expedition in 1206, nearly eighty years Core battlefield: Longyou area (now eastern Gansu, southern Shaanxi, and northern Sichuan) The main line of history: from the fiasco of Fuping to the rise of the Wu brothers, to the three generations of people defending their land and resisting the war Strategic pattern: Confrontation between Song and Jin Dynasties, the Sichuan-Shaanxi defense line became the lifeline of half of the Southern Song Dynasty Topic positioning Feelings of family and country: personal destiny is closely intertwined with the survival of the country Brotherhood: a family bond that is thicker than water and a common ambition to serve the country Strategic Wisdom: The Evolution of Military Thought from Passive Defense to Active Counterattack People's Perspective: Civilian Survival and National Identity in War