6/ In the Middle East there was the United Arab Republic which existed between 1958 and 1971, a union between Egypt (and Gaza, which was under its governance) and Syria
. It lasted from 1958 until 1961, falling as a result of the ‘61 Syrian coup d’état.
https://en.wikipedia.org/wiki/United_Arab_Republic
The United Arab Republic itself entered a confederation with the Kingdom of Yemen to form what was known as the United Arab States