30 September 1950 – The International Astronautical Federation (IAF) was founded in 1951, when scientists from the field of space research gathered in an attempt to ensure a constant dialogue between the space nations, regardless of political turmoil. In its early years, the Federation and its annual International Astronautical Congresses – better known as the
4 December 1967 – On this day during the Vietnam War: U.S. and South Vietnamese forces engage Viet Cong troops in the Mekong Delta. (1)
(1) Wikipedia