Avraham was born in 1948, and per our tradition, the Tower of Bavel was built in 1996. The servitude of the kings of S'dom and Amora began in 1998, ending in 2010. The 13 years of rebellion began in 2011. See Midrash Seder Olam Rabba, wherein the entire story is 26 years long, from 1998 until 2024, when the war between the four and the five kings took place.