Claim: Khal Drogo was introduced in the 1996 novel A Game of Thrones.
Evidence: Introduced in 1996 's A Game of Thrones , Drogo is a khal , a leader of the Dothraki , a tribe of warriors who roam the continent of Essos.
A Game of Thrones is the first novel in A Song of Ice and Fire , a series of fantasy novels by American author George R. R. Martin.