I'm sure most people know the general events of the Space Race and who achieved what and when, but I wonder how far along the Soviet Union was to landing their own moon missions. Did they even think such a thing was possible and if they did, how close were they to starting their own mission? Did their early advantage in the race factor into their decisions?
While more can always be said, you may enjoy
this answer by /u/kieslowskifan
and
this answer by /u/TheoremaEgregium
While it is mentioned in passing by both answers, I do want to emphasize the Soviets had a more military focus with their space program; had manned moon landing been found to have some military purpose, there likely would have been the political will to keep going.