A Military Paper on Forgetting War and Danger
Examples can be taken from the last dynasty in ancient China or the last days of each dynasty, such as Xia Jie, Shang Zhouwang, Zhou Youwang, the "Three-point Jin State", the late Five Great Powers, the end of the Seven Chivalries and the end of the Qin Dynasty. The idiom is "Be prepared for danger in times of peace", and never "be born in sorrow and die in happiness".