How to defend a siege (red swords)

In this video you will see how to defend a siege (red swords) set by an enemy. The process is the same as attacking a siege set by your guild (green swords) shown in another video I posted. There can be times where you have a friendly guild take one of your guilds sectors to help build a block from other guilds coming in. In that case you want to look to see who is attacking because you don't always want to defend a siege, especially if it is a friendly guild helping. Anyone in guild can defend a siege. No special GvG rights/permissions need to be given to be able to defend.