# Hans-Ferdinand Geisler

> German navy officer and world war II U-boat commander

**Wikidata**: [Q10293720](https://www.wikidata.org/wiki/Q10293720)  
**Source**: https://4ort.xyz/entity/hans-ferdinand-geisler-q10293720


## References

1. Die deutschen U-Boot-Kommandanten (1 ed.)
2. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/U_21)