That's right, kiddos: by 1500 alone the hyperexpansionist empire of the Haudenosaunee (oh, it's a
chiefdom, my bad) extended from the conquered Neutral Confederacy to the west (not so neutral now,
huh?) to the subjugated paramountcies of the Chesapeake Bay. Also, no chiefdoms or stratified, ranked societies of any kind existed in the middle bit of the Eastern Seaboard. Or
anywhere in the Caribbean (sorry, Agueybana). Or the non-Maya bits of Central America. Or the west coast of Mexico; in fact,
nobody even farmed there. Everyone knows maize and beans were simply teleported to Oasisamerica (you thought
sipapus were ceremonial? HA!). And I guess the Timucua and Calusa count as Mississippian.
Also I
really hope we're not supposed to interpret the entire red area in Mexico as "Aztec Empire"...