Thank you for bringing us this glimpse of Polish history, @livinguktaiwan. Particularly important to know all of the details of timing, etc. in understanding it properly.
"... and reclaim their country with Soviet's support. Except, the Soviets never arrived as planned ..."
Stalin "bled them out," before taking over, to lessen resistance to what he knew was coming to the Polish people. So sad ... We can only imagine what those inside this movement must have felt, upon learning they had been betrayed.
"... everyone fought for what they believe, and there was no guarantee of success or victory. But that didn't deter people from fighting even if it means losing freedom or your life."
This succinctly states it, I believe. Here in America, after our Revolutionary War against a superior force against which there was supposedly no hope, this mindset carried people through it. Most notably enshrined in the state motto of New Hampshire:
"Live Free or Die"
Very good that you could close on noting the memory of these brave people was revived in 1988. Hopefully, the Polish people never let that memory fade.
It has to very brave souls to start a revolution, it's all or nothing, once you've started there's no turning back, Live Free or Die is so very true. One only needs to look at modern-day Russia now, another brave soul lost. Hopefully his sacrifice will not go in vain.
Amen, @livinguktaiwan ...
... as it was extraordinary that he elected to return to Russia, after his unbelievable recovery from poisoning. He must have been very clear about what awaited him there.
What I have never personally seen anything written about it, was did he return with at least some hope for support from others? And did this brave man die, disappointed by the response?
I don't know. But, it takes us full circle back to a central point of your post here, about this memorial to brave Polish people who were betrayed ...