My maternal grand-uncle died fighting Germans in Kolobrzeg (Kolberg) city and is buried there.
My maternal grand-aunt was in the army as well and accompanied the army up to Wrocław (Breslau), if I'm not mistaken.
My maternal grandfather's two children died during some bombardement. They went outside, and when they returned, their house was destroyed.
My maternal family was moved after ww2 from Ukraine to western Poland. Allegedly originally my maternal grandmother's family didn't want to go, but someone there, who was a postman, was summoned to Moscow. They got so scared from it that they packed and went to Poland the same day. My mother once mentioned that my grandmother had to prove she's Polish, so perhaps it was not that obvious.
Also, my grandma once mentioned some German who told my grand-aunt that she's too nice to be polish or something.
My paternal grand-uncle or something was shot by Germans, but I think he survived. You see, a dead German was found in the vicinity of this village (nominally a quarter of Rzeszow), so Germans killed every male in it. There is a mass grave there, we always put a light there.
There were also two other stories, one told by my grand-aunts about Germans visiting their house, but some my grand-grandmother was just dieing, so they went out.
The other is about some "aunt", who had a romance with a German occupation soldier, who came from Sudetenland. The polish resistance decided to kill her, but they've made a mistake and killed the wrong sister. Later on, her mother recognised them in the city and made a scene, so they killed the mother and the father as well. The girl herself ran away. The resistance asked my grandma for where she's gone, but she refused to tell. They wanted to kill her as well, but eventually didn't. After the war, the "aunt" and the Sudetenguy moved to the USA and had a child, but later divorced.
That's all I remember.