Largest Contiguous Land Empire in History

This page is the CodyCross answer for the clue below from California, Group 1145, Puzzle 3 (Animation Studios).

Question is: Largest Contiguous Land Empire in History

and the answer is: MONGOL

Word Meaning:

MONGOL — (dated, offensive) Alternative letter-case form of Mongol (“a person with Down's syndrome”).

Definitions from Wiktionary.