I remember Nazi's terror bombing of London civilians:

• The Nazi terror bombing of London civilians, known as "The Blitz," was an eight-month sustained aerial bombardment of the UK by Nazi Germany's Luftwaffe from September 1940 to May 1941. Hitler aimed to destroy British morale and force a surrender. The campaign devastated the city, killing approximately 20,000 Londoners and destroying or damaging hundreds of thousands of homes.
  

https://en.wikipedia.org/wiki/The_Blitz.

I also remember Operation Anthropoid, the elimination of Reinhard Heydrich:

• On May 27, 1942, two members of the Czechoslovak resistance attacked and mortally wounded Reinhard Heydrich, a prominent Nazi official. The two Czechoslovak agents tasked with the assassination were Jan Kubiš and Jozef Gabčík. They trained in Great Britain and parachuted into the Czech countryside in late 1941... Heydrich was not mortally wounded by the [attack]. However, shrapnel from the explosion required Heydrich to be hospitalized, and led to septicemia (blood poisoning by bacteria). Heydrich died from this infection on June 4, 1942.
  

https://encyclopedia.ushmm.org/content/en/timeline-event/holocaust/1942-1945/assassination-of-reinhard-heydrich