 Movement of such seemingly unwieldy groups of soldiers was difficult but well trained and experienced tercios were able to move and manoeuvre with surprising facility and to great advantage over less experienced opponents.They would be co-ordinated with each other in a way that often caught attacking infantry or cavalry with fire coming from different directions from two or more of these strong infantry squares.The great rivals of the Spanish/Habsburg Empire, the Kings of France, had access to a smaller and poorly organized force of pike and shot.