I remember that Somora Michel, the leader of the Marxists in Mozambique eventually turned on the Soviets, and soon after died in a mysterious plane crash.
I guess that was the dilemna they faced after taking Soviet aid; it came with Soviet control. The same happened in Spain’s civil war; after looting the treasury’s gold, the USSR took overcontrol of the war effort despite the fact that communists had been a very small portion of the “popular front” movement. After the first year they eliminated the leadership of their anarchist allies, and forced the rank-and-file into communist-led units; since the USSR provided the lion’s share of weapons, there was little anyone could do. It did destroy morale, though; true liberals and libertarians realized early on that their freedom-loving ideals were crushed.