It’s not that much linked to communism, but i like lemmit.online and there’s one or two interesting information. I especially liked the clear link between the dates and the geographical position.
There’s not much use in pointing out the obvious, that it’s western centric and make it sound as if the u.s.a. liberated China(, which may indeed be the case for all i know, even if they didn’t recognised the p.r.c. until 1979, the u.s. lost less men in Asia than the number of civilians killed by two atomic bombs b.t.w., and their losses were only ~1% of those of the u.s.s.r. or China, they mainly prevented the soviets from liberating western Europe, and China from expanding communism in Asia, and recovering Taiwan).