State of Lu in the context of "Zuo Zhuan"

The Spring and Autumn Annals is an ancient Chinese chronicle that has been one of the core Chinese classics since ancient times. The Annals is the official chronicle of the State of Lu, and covers a 242-year period from 722 to 481 BCE. It is the earliest surviving Chinese historical text to be arranged in annals form. Because it was traditionally regarded as having been compiled by Confucius—after a claim to this effect by Mencius—it was included as one of the Five Classics of Chinese literature.

The Annals records main events that occurred in Lu during each year, such as the accessions, marriages, deaths, and funerals of rulers, battles fought, sacrificial rituals observed, celestial phenomena considered ritually important, and natural disasters. The entries are tersely written, averaging only 10 characters per entry, and contain no elaboration on events or recording of speeches.

The Spring and Autumn period (c. 770 – c. 481 BCE) was a period in Chinese history corresponding roughly to the first half of the Eastern Zhou (c. 771 – 256 BCE), characterized by the gradual erosion of royal power as local lords nominally subject to the Zhou exercised increasing political autonomy. The period's name derives from the Spring and Autumn Annals, a chronicle of the state of Lu between 722 and 481 BCE, which tradition associates with Confucius (551–479 BCE).

During this period, local polities negotiated their own alliances, waged wars against one another, up to defying the king's court in Luoyi. The gradual Partition of Jin, one of the most powerful states, is generally considered to mark the end of the Spring and Autumn period and the beginning of the Warring States period. The periodization dates to the late Western Han (c. 48 BCE – 9 CE).