The battlements are on top of the castle, in between the towers. These walkways have raised walls to prevents soldiers from fall off them or being picked off by archers. The walkways have narrow slots carved out at regular intervals for archers to aim through with getting hit themselves. There are also wider slots at longer intervals with cannons stationed at them. Flush against the outside walls are short, long boxes for soldiers to place their extra weapons in when preparing for a seige.
Battlements, Outside Castle
knight
archer
I am often employed to be a soldier in someone's army. I am a very good show with my bow and arrow. I like the heat of battle.
Hey there Are you going to just stand here talking or keep practicing? Well, I'm taking a rest Rest?!?! Who has time for a rest. You must always be reading to fight. You have it easy hiding behind these stone walls while brave knights like myself fight on the front line. Without rest you'll be dead before the next fight Speak for yourself weakling! Give me that. You probably don't know how to use it any way! I'll beat you at a game any day anytime You dare challenge a Knight in the royal army? You dare challenge the best archer in all the kingdom Oh ho I doubt you are the best when you are sitting there "resting"  I bet you think working your self to death makes you a better archer? I am no archer. I am strong brave knight who you should fear. You'd do best to stay out of my way archer!