Swedish–Norwegian War. 1816 – The United Kingdom formally annexes the Tristan da Cunha archipelago, administering the islands from the Cape Colony in South Africa. 1842 – American Indian Wars: Second Seminole War ends, with the Seminoles forced from Florida. 1848 – Oregon Territory is organized by act of Congress. 1880 – Construction of Cologne Cathedral, the most famous landmark in Cologne, Germany, is completed. 1885 – Japan's first patent is issued to the inventor of a rust-proof paint. 1893 – France becomes the first country to introduce motor vehicle registration. 1900 – The Eight-Nation Alliance occupies Beijing, China, in a campaign to end the bloody Boxer Rebellion in China. 1901–present 1901 – The first claimed powered flight, by Gustave Whitehead in his Number 21. 1914 – World War I: Start of the Battle of Lorraine, an unsuccessful French offensive. 1917 – World War I: The Republic of China, which had heretofore been shipping labourers to Europe to assist in the war effort, officially declares war on the Central Powers, although it will continue to send to Europe labourers instead of combatants for the remaining duration of the war. 1920 – The 1920 Summer Olympics, having started four months earlier, officially open in Antwerp, Belgium, with the newly-adopted Olympic flag and the Olympic oath being raised and taken at the Opening Ceremony for the first time in Olympic history. 1921 – Tannu Uriankhai, later Tuvan People's Republic is established as a completely independent country (which is supported by Soviet Russia). 1933 – Loggers cause a forest fire in the Coast Range of Oregon, later known as the first forest fire of the Tillamook Burn; destroying of land. 1935 – Franklin D. Roosevelt signs the Social Security Act, creating a government pension system for the retired. 1936 – Rainey Bethea is hanged in Owensboro, Kentucky in the last known public execution in the United States. 1941 – World War II: Winston Churchill and Franklin D. Roosevelt sign the Atlantic Charter of war stating postwar aims. 1947 – Pakistan gains independence from the British Empire. 1959 – Founding and first official meeting of the American Football League. 1967 – UK Marine Broadcasting Offences Act declares participation in offshore pirate radio illegal. 1969 – The Troubles: British troops are deployed in Northern Ireland as political and sectarian violence breaks out, marking the start of the 37-year Operation Banner. 1971 – Bahrain declares independence from