303: First official Roman edict for persecution of Christians issued by Emperor Diocletian at Nicomedia, ordering all churches to be closed and scriptures burnt

1632: Galileo Galilei’s book “Dialogue Concerning the Two Chief World Systems” is published comparing the Copernican and Ptolemaic systems and whether the Earth orbits the sun

1774: British House of Lords rules authors do not have perpetual copyright

1797: The Last Invasion of Britain, launched by the French during the Revolutionary Wars, begins near Fishguard, Wales

1825: Russia and Britain establish the Alaska-Canada boundary

1967: 25,000 US and South Vietnamese troops launch Operation Junction City against the Viet Cong. Largest US airborne assault since World War II.

Source: Onthisday.com