Dacian Falx vs. Roman Helmets & Armor

[Gaius Colletti]

Thank you for clarifying the "average" lifespan Crispus. I am inclined to agree with you about the falx being used more for cutting off limbs, however to what can we explain the crossbars being used on Roman helmets? We know that the crossbars were sometimes hastily put on the helmets right over the brass decorations. However, I am questioning how effective a crossbar on the helmet would have been against a falx. Is it possible it was used for something else?