# SM U-40

> 1914 Type U 31 submarine

**Wikidata**: [Q835050](https://www.wikidata.org/wiki/Q835050)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SM_U-40_(Germany))  
**Source**: https://4ort.xyz/entity/sm-u-40


## References

1. Freebase Data Dumps. 2013