# 21st U-boat Flotilla

> flotilla

**Wikidata**: [Q556168](https://www.wikidata.org/wiki/Q556168)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/21st_U-boat_Flotilla)  
**Source**: https://4ort.xyz/entity/21st-u-boat-flotilla


## References

1. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/U_29)
2. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/U_101)
3. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/U_708)
4. [Source](https://www.uboat.net/boats/u922.htm)
5. [Source](https://uboat.net/boats/u720.htm)
6. [Source](https://uboat.net/boats/u733.htm)
7. [Source](https://uboat.net/boats/u119.htm)
8. [Source](https://uboat.net/boats/u704.htm)
9. [Source](https://uboat.net/boats/u368.htm)
10. [Source](https://uboat.net/boats/u139.htm)
11. [Source](https://uboat.net/boats/u141.htm)
12. [Source](https://uboat.net/boats/u148.htm)
13. [Source](https://uboat.net/boats/u121.htm)
14. [Source](https://uboat.net/boats/u151.htm)
15. [Source](https://uboat.net/boats/u152.htm)
16. [Source](https://uboat.net/boats/u416.htm)
17. [Source](https://uboat.net/boats/u430.htm)
18. [Source](https://uboat.net/boats/u746.htm)
19. [Source](https://uboat.net/boats/u977.htm)
20. Freebase Data Dumps. 2013
21. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/Herwig_Collmann)
22. [Source](http://www.ubootarchiv.de/ubootwiki/index.php/21._U-Flottille)