Comment Re:Absolutely false (Score 1) 180
This doesn't mean the convention has nothing to do with it, but it's not surprising that the Geneva convention would choose to adopt the rules that everyone was already following a lot of the time.
Also note that your history indicated that "sawback" bayonets were mainly used by the German armies. Adopting a prohibition against them may have been a political move to allow retroactive condemnation of the "uncivilized" enemy army.
Causation in the real world is usually a complicated thing. Especially when politics and treaties are involved.