Poland and Ukraine stand together against the Russian threat, but their unity is weakened by a long-standing and bitter historical conflict.
Ar ôl i Rwsia ymosod ar Wcráin ym mis Chwefror 2022, daeth undod rhwng Gwlad Pwyl ac Wcráin yn un o straeon mwyaf cynnes rhyfel creulon y Kremlin. Rhuthrodd miliynau...