What caused a civil war between the Red Army and the White army.

The Red Army was an army of communists. The White Army opposed the communists. Other forces fought against both these groups or sometimes helped one against the other. ... The Red Army won this war because their army was better-organized and they held the best territory.

Explanation:

answer; i believe the above statement is (true);

answer; /// i believe that the correct answer is (d)the huang he river valley;