These soldiers are simply armoured characters with a sword like rifle. In is these and the next one I am trying to make a more knight based style, The inspiration in these being Germanic soldiers from 100-400 AD and Roman legionaries from 300 AD.

 These are inspired more by the Byzantium infantry from around the year 700 (Middle one especially) and the Knights of the Order of St. John (1225-1525)

These designs were to reflect more cultures, but the associated thumbnail from which they sprang offered the unique silhouette. The right most image has a tribal feel to it, imitating the polished brass and bird symbolism of the Inca or Aztec cultures.