# U-21

> 1936 Type IIB submarine

**Wikidata**: [Q554487](https://www.wikidata.org/wiki/Q554487)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/German_submarine_U-21_(1936))  
**Source**: https://4ort.xyz/entity/u-21


## References

1. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/U_21)
2. Freebase Data Dumps. 2013
3. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/Georg_Schewe)