Smoke in WW II

[jivemi]

Given the extremely useful nature of smoke in the game, I was wondering if anyone has heard of any battles, skirmishes, etc. where smoke was used in combat situations. I can only recall three examples offhand:

1) Cover for Major Cook's Waal River assault during Market Garden (the smokescreen blew away by most accounts).
2) Cover for engineers removing anti-tank mines during the first stage of Montgomery's El Alamein offensive.
3) Cover for tanks--fired by the tanks themselves--of the Sherwood Rangers when ambushed by Tigers .

So why wasn't it used more often? Or was it? I've never heard of smoke used to any significant degree in major landings like D-Day or Tarawa. Just wondering aloud why not; seems like it would prevent many casualties if properly employed under the right conditions.