Middle (hope this helped) Have a nice day
Because it was an easy source of water for their needs that required it and it was also and easy way to transport supplies to the battle sight if an army was in a foreign location. Hope this helps, if you need clarification let me know?
The Second Barons' War (1264–1267) was a civil war in England between the forces of a number of barons led by Simon de Montfort against the royalist forces of King Henry III, led initially by the king himself and later by his son, the future King Edward I. The barons sought to force the king to rule with a council of barons rather than through his favourites.