Hi, you may be interested in these earlier posts

• How accurate is the movie portrayal of "war games" with table sized maps, miniature flags and armies, and sticks to push everything around?

• Is there historical evidence to support the trope of medieval generals moving around figures representing troops on a large map?

• Giant military maps featuring /u/MarcEcko

Mods, I'm still getting the hang of what you expect. I apologize if this answer doesn't meet your standards.

Ian Toll's Pacific Crucible cites two examples of "giant maps" being used during WW2. During the planning for the Midway operation the Japanese Combined Fleet staff held a conference and wargaming session. Large tabletop maps were used for those wargames where they hashed out different scenarios.

Toll's other example is from Nimitz's CINCPAC headquarters during the battle of Midway. He said that they had a large map of the pacific mounted on a pair of sawhorses (if I remember correctly.) There were no miniature ships on this map, but erasable crayons were used to mark the last known locations of allied and Japanese fleets.