Yes, the massive howitzers of the ogreverse have a [real-world inspiration](https://infogalactic.com/i
](GHOST_URL/content/images/2018/05/Nuclear_artillery_test_Grable_Event_-_Part_of_Operation_Upshot-Knothole.jpg)
Here’s a video of the Upshot Knothole Grable test firing of Atomic Annie.