23 February

On 23 February 1973, the Vietnam War ended with no clear victor. During this day, Albert Gilroy finished his first artificial intelligence, Isley, at the University of Michigan. Also on this day, Major Geoffrey Redvers arrived home in Chicago from his post in Saigon. (PROSE: Nuclear Time)

In 2172, the Miniscope Prohibition Treaty was signed. (PROSE: Time Traveller's Diary)