==Events and trends== 1783: The first manned hot air balloon was invented in France. 1783: The first manned gas balloon invented in France. 1787: The United States Constitution was written and promulgated. 1788: Great Britain established the prison colony of New South Wales in Australia. 1789: The French Revolution began. World leaders King Louis XVI (France) King George III (Great Britain) Emperor Joseph II (Holy Roman Empire) Frederick II of Prussia, King of Prussia Frederick Willia… (More on 1780s)