The progress of any of the ancient civilizations has been based on war and revolution. This is not untrue for the Chinese either. Their entire history is wrought with the steady churn of conquest and internal unrest. The occasional rebellion would institute a new dynasty, for example, while another would bring down the imperial system.
War has also been the occasional visitor to China. The first world war was for China what it was for the rest of the world; a catalyst for change. The second world war had the same effect. At the junction of 1911 and 1912, the whole of China completely changed. It is not often acknowledged in historical texts the implication of the May 4th Movement. The last of the ancient civilizations came to an end. Were it the Roman or Egyptian empires that lasted until early 20th century, there would have been more written about their downfall due to the influence of both on Europe and the west.
Conflicts and War shows both outward influences on war in China and how war in China can influence the world.