The states of the Northeast and the South, along with the District of Columbia, are divided into four groups. What are they?

Since 1950, the United States Census Bureau defines four statistical regions, with, These twelve Federal Reserve Banks together form a major part of the, within its borders, as some states are divided into more than one district.

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."