I listen to the QI Podcast ‘No Such Thing As A Fish‘ and so was very happy to hear Yo-Yo coming up as a topic. They were careful handling the subject of the Yo-Yo being used as a traditional weapon. Personally I don’t think the Yo-Yo was a weapon and there is very little evidence to support the claim.
Either way, a very enjoyable listen!
If you didn’t get enough Yo-Yo facts (can you ever have enough?) then I think Down-Up is probably the next logical place to look!