About the spike part: anyone remembering a, well sort of, spikes the CIA handed to their Cuban friends to litter the roads with and effectively end all forms of transport by road? I mean those are nearly the same as the spikes the Medieval Archers used (the CIA ones were to be assembled from 2 pieces) and they do hurt infantry. Not all infantry carries all steel suits!

But still: such a pity the infantry guys seemed to have charged recklessly towards archers...