Nimrod began his kingdom in Shinar, and the tower of Babel was built in a plain in Shinar.
Story
The beginning of Nimrod's kingdom
Nimrod was a mighty man and a mighty hunter before the Lord. The beginning of his kingdom was Babel, Erech, Accad, and Calneh, in the land of Shinar. From that land he went into Assyria and built Nineveh, Rehoboth-Ir, Calah, and Resen between Nineveh and Calah; that is the great city.
The whole earth assembles at Babel until the Lord disperses them
People migrated from the east and settled in a plain in the land of Shinar. They built a city and a tower with its top in the heavens, and from there, called Babel, all the people were dispersed throughout the face of the earth.
War of Nine Kings
Amraphel king of Shinar, Arioch king of Ellasar, Chedorlaomer king of Elam, and Tidal king of Goiim made war with Bera king of Sodom, Birsha king of Gomorrah, Shinab king of Admah, Shemeber king of Zeboiim, and the king of Bela (Zoar) in the Valley of Siddim (the Salt Sea). They had served Chedorlaomer for 12 years but rebelled in the 13th year. In the 14th year, Chedorlaomer's side defeated the Rephaim in Ashteroth-karnaim, the Zuzim in Ham, the Emim in Shaveh-kiriathaim, and the Horites in their hill country of Seir as far as El-paran on the border of the wilderness. Then they turned back for En-mishpat (Kadesh) and defeated all the country of the Amalekites and also the Amorites dwelling in Hazazon-tamar.
Then the kings of Sodom, Gomorrah, Admah, Zeboiim, and Bela (Zoar) joined battle in the Valley of Siddim with Chedorlaomer king of Elam, Tidal king of Goiim, Amraphel king of Shinar, and Arioch king of Ellasar: 4 against 5. As the kings of Sodom and Gomorrah fled, some fell into the area's many bitumen pits and the rest fled to the hill country. The enemy took all their possessions and provisions and left, including Lot and his possessions.
An escapee told Abram at the oaks of Mamre the Amorite, brother of Eshcol and Aner, all his allies. Abram led his 318 trained men in pursuit as far as Dan, dividing his forces against them by night, defeating them, and pursuing them to Hobah, north of Damascus. He brought back all the possessions and his kinsman Lot with his possessions, and the women and the people.