Question

what regions were added to the united states from 1803 to 1819

Answer 1

The region aded from 1803 to 1819 to US were: 

-in 1803: Louisiana

-in 1810: West Florida

-in 1818: Red River

-in 1819: East Florida

Answer 2

in1803 louisiana 
in 1810 west flordia
in 1818 red river 
in 1819 east flordia