[Calvin Locke]

Saw a tank show on the Canadians in Italy. The Germans mounted V turrets on subterranean concrete support bunkers.

Low profile, four of them stopped a platoon of Shermans, and the advance in that sector, cold.

(Naturally, you have to wonder why artillery or air support wasn't called in.)

[FreedomPoster]

Both of the latter would have a hard time with that situation as well. A decent tank will withstand HE reasonably well, short of a direct hit to the thinner top armor, and direct air support for that sort of thing was fairly difficult in that era.

[TangibleDisgust]

those are called Panzerkuppel or Panzerturm. generally obsolete or knocked out tanks had their turrets removed for use as fixed fortifications if there was a benefit. guarding airfields or for use on the Siegfried line. these were simply delaying measures. since the fortifications couldn't move, it was only a matter of time until they'd be knocked out by artillery or tanks or anti-tunk guns. you could also bypass them and deal with them later. there are still a handful of these around that have been left as WWII monuments.

sometimes late in the war, during city defenses, a tank would be dug in and operate as a panzerturm. either due to tank damage, or lack of fuel, or desperateness of the situation.