In ancient China warfare was a means for one region to gain ascendancy over another, for the state to expand and protect its frontiers, and for usurpers to replace an existing dynasty of rulers. With armies consisting of tens of thousands of soldiers in the first millennium BCE and then hundreds of thousands in the first millennium CE, warfare became more technologically advanced and ever more destructive. Chariots gave way to cavalry, bows to crossbows and, eventually, artillery stones to gunpowder bombs. The Chinese intelligentsia may have frowned upon warfare and those who engaged in it and there were notable periods of relative peace but, as in most other ancient societies, for ordinary people it was difficult to escape the insatiable demands of war: either fight or die, be conscripted or enslaved, win somebody else's possessions or lose all of one's own.
This is a companion discussion topic for the original content at https://www.worldhistory.org/Chinese_Warfare/.