Answer:
Analyzing key events of the worsening of superpowers relations from 1979-85 is explained completely below in details.
Step-by-step explanation:
There was the arrangement over restricting the creation of long-range weapons.
The USSR attacked Afghanistan using the reason that the new communist administration needed their guidance. This violated present arrangements on communist augmentation.
These contracts never came to much - the Soviet Union attacked Afghanistan in 1979 and the Cold War started to intensify once more.