A siege is where a group or groups of people are trying to take over a castle. This group of people are trying to take over the castle to gain more land and power. Sometime they will camp out and wait for the people, in the castle, to run out of food and be forced out.
A battering Ram was used to punch and shake down gates, doors and walls. It was one of the famous medieval weapons. It was used in the middle ages to take over a castle.
URL: The Sieging of Medieval Castles