Explain the details about the Russian campaign that the author of “A Brief Stop”

Russian commanders saw that they were vastly outnumbered and that a battle would be pointless, so they retreated.

brainliest?

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

b. ensure mutual protection from communism.

.