Nazi Germany, Italy, and Japan were part of the Axis powers, while countries like the United States of America, the United Kingdom, Russia, China, Canada, France, South Africa, Australia, and New Zealand formed the Allies.
The Bombing of Dresden took place in the last year of World War II. It was documented in the Kurt Vonnegut novel Slaughterhouse-Five. Unbeknownst to many, Starfleet officers Daniel Radke, Anne Lansing and Antonio Fernandes successfully stopped an alien invasion by luring the aliens into Dresden during the bombing, incinerating all the aliens and restoring the timeline. (Star Trek: The Cantabrian Expeditions: "Hemorrhage")