1820s

Events and trends

 * Nationalistic independence helped reshape the world during this decade:
 * gains independence from the in the  (-).
 * Several countries declared their independence from and :
 * The under President  ( - ) expands over
 * The were formed in.
 * The opens - passage from  to  and the  is dug to extend settlement access and commercial traffic to the.
 * emerges in U.S.
 * s begin to settle in the Colony of with the support of the
 * emerges in U.S.
 * s begin to settle in the Colony of with the support of the

World leaders

 * Emir
 * Supreme director
 * Acting supreme director
 * President
 * President
 * General
 * General
 * Emperor
 * Chancellor
 * Sheikh
 * Sheikh
 * Administrative leader
 * Administrative leader
 * President
 * President
 * President
 * President
 * President
 * President
 * Emperor
 * Sultan
 * Sultan
 * Sultan
 * King
 * President
 * President
 * Provisional triumvirate of the three provinces
 * Interim Supreme Director
 * Acting Supreme Director
 * President
 * President
 * President
 * President
 * Emperor
 * President
 * King
 * Governor
 * Emperor
 * Emperor
 * Emperor
 * President
 * President
 * President
 * King
 * King
 * Governor
 * King
 * President
 * Khan
 * Khan
 * Emperor
 * Emir
 * Emperor
 * President
 * President
 * President
 * President
 * Sultan
 * Sultan
 * Padshah
 * of
 * King
 * Maharaja
 * Emperor
 * Emperor
 * King
 * King
 * King
 * King
 * King
 * King
 * King
 * President
 * President
 * Emperor
 * King
 * President
 * President
 * Emperor