Since some travelers ask for military sights and museums. I like to share that a new small museum / exhibition was opened in Berlin.
"At the Ukraine Museum, we present personal stories, the brutality of the war, and everything Russia wants to keep secret, all within a 300-square-meter exhibition space." (link to museum website)
From a rbb article: "The exhibits in the exhibition change regularly, as was reported. To this end, visits are made to Ukraine every month to bring back new objects and information. Interviews were also conducted with people, including on the question: “Leave or stay?”" (link to article in German language)
Disclaimer: I am not involved or invested in this museum in any way.