WHAT ALL HAPPENED APRIL TO SEPTEMBER 1839
Find out what all happened April to September 1839

In the Kingdom of Hawaii, Kamehameha III issues the edict of toleration which gives Roman Catholics the freedom to worship in the Hawaiian Islands. The Hawaii Catholic Church and the Cathedral of Our Lady of Peace are established as a result. (17. June 1839)

John Herschel takes the first glass plate photograph. (9. September 1839)

The Treaty of London establishes Belgium as a kingdom and guaranteeing its neutrality. (19. April 1839)

The French government announces that Louis Daguerre's photographic process is a gift "free to the world". (19. August 1839)

The United Kingdom declares war on the Qing Dynasty of China. (5. September 1839)

The United Kingdom captures Hong Kong as a base as it prepares for war with Qing China. The ensuing 3-year conflict will later be known as the First Opium War. (23. August 1839)

In Humen, China, Lin Tse-hsü destroys 1.2 million kg of opium confiscated from British merchants, providing Britain with a casus belli to open hostilities, resulting in the First Opium War. (3. June 1839)

Twenty miles off the coast of Cuba, 53 rebelling African slaves led by Joseph Cinqué take over the slave ship Amistad. (2. July 1839)

Cherokee leaders Major Ridge, John Ridge, and Elias Boudinot are assassinated for signing the Treaty of New Echota, which had resulted in the Trail of Tears. (22. June 1839)

The first state normal school in the United States, the forerunner to today's Framingham State College, opens in Lexington, Massachusetts with 3 students. (3. July 1839)

Henley Royal Regatta: the village of Henley-on-Thames, on the River Thames in Oxfordshire, stages its first regatta. (14. June 1839)