The caetra was a circular shield used by Iberian, Celtiberian, Gallaecian, and Lusitanian warriors.
Notes on verification
Multiple independent sources corroborate all key details: the circular shape and all four warrior groups mentioned. Sources include specialized military history references and linguistic dictionaries, providing strong cross-verification of both the shield's physical characteristics and its cultural distribution across Iberian Peninsula peoples.
Sources
- Caetra (wikipedia)
- https://military-history.fandom.com/wiki/Caetra (corroboration)
- https://grokipedia.com/page/caetra (corroboration)
- https://www.wordmeaning.org/spanish/caetra.htm (corroboration)