WHAT ALL HAPPENED APRIL TO SEPTEMBER 1821
Find out what all happened April to September 1821

Greek War of Independence: The Greeks defeat the Turks at the Battle of Gravia Inn. (8. May 1821)

Decisive defeat of the Philikí Etaireía by the Ottomans at Drăgăşani (in Wallachia). (19. June 1821)

The first major battle of the Greek War of Independence against the Turks is fought in Valtetsi. (12. May 1821)

Jarvis Island is discovered by the crew of the ship, Eliza Frances. (21. August 1821)

Emperor Napoleon I dies in exile on the island of Saint Helena in the South Atlantic Ocean. (5. May 1821)

Mexico gains its independence from Spain. (27. September 1821)

Tripolitsa, Greece, is captured by Greek rebels during the Greek War of Independence. (23. September 1821)

The Treaty of Córdoba is signed in Córdoba, now in Veracruz, Mexico, concluding the Mexican War of Independence from Spain. (24. August 1821)

Establishment of the Peloponnesian Senate by the Greek rebels. (26. May 1821)

Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica jointly declare independence from Spain. (15. September 1821)

Patriarch Gregory V of Constantinople is hanged by the Ottoman government from the main gate of the Patriarchate and his body is thrown into the Bosphorus. (10. April 1821)

470 prominent Cypriots including Archbishop Kyprianos are executed in response to Cypriot aid to the Greek War of Independence (9. July 1821)

Missouri is admitted as the 24th U.S. state. (10. August 1821)

While the Mora Rebellion continues, Greeks capture Monemvasia Castle. Turkish troops and citizens are transferred to Minor Asia coasts. (23. July 1821)

The University of Buenos Aires, Argentina, is officially opened. (26. August 1821)

The Battle of Carabobo takes place. It is the decisive battle in the war of independence of Venezuela from Spain. (24. June 1821)

José de San Martín declares the independence of Peru from Spain. (28. July 1821)

Atkinson & Alexander publish The Saturday Evening Post for the first time as a weekly newspaper. (4. August 1821)

Badi VII, king of Sennar, surrenders his throne and realm to Isma'il Pasha, general of the Ottoman Empire, ending the existence of that Sudanese kingdom. (14. June 1821)

The United States takes possession of its newly bought territory of Florida from Spain. (10. July 1821)