https://www.britannica.com/event/Soviet-invasion-of-Afghanistan

https://www.bbc.co.uk/bitesize/guides/ztb8y4j/revision/2

https://www.nytimes.com/2019/01/29/us/politics/afghanistan-trump-soviet-union.html

https://www.theatlantic.com/photo/2014/08/the-soviet-war-in-afghanistan-1979-1989/100786/

https://digitalarchive.wilsoncenter.org/topics/soviet-invasion-afghanistan

https://www.jstor.org/stable/44642132

https://history.state.gov/milestones/1977-1980/soviet-invasion-afghanistan

https://www.history.com/news/1979-soviet-invasion-afghanistan