The State of Eastern Guo was an important Chinese vassal state in the early years of the Western Zhou Dynasty (1046-770 BCE).

After King Wu of Zhou

King Wu of Zhou

King Wu of Zhōu or King Wu of Chou was the first sovereign, or ruler of the Chinese Zhou Dynasty. The dates of his reign are 1046-1043 BCE or 1049/45-1043. Various sources quoted that he died at the age of 93, 54 or 43. He was considered a just and able leader. Zhou Gong Dan was one of his...

 destroyed the Shang Dynasty in 1046 BCE, his two uncles received grants of land from King Wu’s father, King Wen of Zhou

King Wen of Zhou

King Wen of Zhou family name : Ji , Clan name : Zhou Personal name: Chang, known as Zhou Chang or Xibo Chang was the founder of the Zhou Dynasty and the first epic hero of Chinese history....

. One, known as the State of Western Guo

Western Guo (state)

The State of Western Guo was a vassal state in China during the Zhou Dynasty. "Guo" seems to have been a kinship group that held at least five pieces of territory within the Zhou realm at various times....

 was at Yongdi and the other, the State of Eastern Guo, at Zhidi (modern day Xiyang City, Henan Province

Henan

Henan , is a province of the People's Republic of China, located in the central part of the country. Its one-character abbreviation is "豫" , named after Yuzhou , a Han Dynasty state that included parts of Henan...

). These two states provided the Zhou Kings with a protective barrier on both sides of their territory.

The State of Eastern Guo barely survived into the Spring and Autumn Period (770-475 BCE). It was destroyed by the State of Zheng

Zheng (state)

Zheng （) was a vassal state in China during the Zhou Dynasty located in the centre of ancient China in modern day Henan Province on the North China Plain about east of the royal capital at Luoyang. It was the most powerful of the vassal states at the beginning of the Eastern Zhou...

in 767 BCE.