I recently finished a large World War II project that covered the full timeline of the war, and Google Maps was a valuable tool to follow what was happening in any given battle. The problem is Google Maps has more detail than you need, so trying to follow something like Operation Market Garden is much more difficult than just looking at this beautiful battle map:
https://www.alamy.com/a-bridge-too-far-image68088140.html. "The West Point Atlas of War" is another great resource.
Maps cover the spatial side of war, but in addition it's difficult to follow the timeline. My project stitched popular World War II movies together into a chronological series, making it easier to see what was happening across the world at any given time. You can view the episodes and the full blog post here: https://open.substack.com/pub/ww2supercut/p/combining-143-wo.... And in addition "The Second World War" by Churchill's biographer Martin Gilbert, is a chronological, 750 page book that I couldn't put down.