A second round of negotiations resulted in a follow-on agreement in 1979, but the U.S. Senate did not ratify the treaty in reaction to the Soviet invasion of Afghanistan that year.

Source: https://www.chicagotribune.com/suburbs/lake-county-news-sun/opinion/ct-lns-cyr-arms-control-st-0318-20230315-w6s7mvolibemrarixdn3hodciq-story.html

However, following the Soviet invasion of Hungary in November 1956, the US government suspended the “Food for Peace” program to the Soviet Union.

Source: https://dailyreckoning.com/america-cant-be-the-peace-broker/

That amounted to a radical evolution for a Communist politician, who at the time of the 1956 Soviet invasion of Hungary had hailed the suppression as necessary.

Source: https://www.lancashiretelegraph.co.uk/news/national/23808713.ex-italian-president-giorgio-napolitano-dies-aged-98/?ref=rss

The initial influx of Afghan refugees began after the Soviet invasion of Afghanistan in 1979, resulting in over three million Afghans seeking refuge in Pakistan.

Source: https://www.chiangraitimes.com/news/pakistan-undocumented-afghan-nationals/