First things first, by scorching the farmlands surrounding the castles about to be besieged, after harvesting as much as they could from them for themselves. It's much easier for besieging armies to live off the land than to have an entire logistical enterprise supplying their army while they try to starve the enemies out. So there's no reason to make that easier.
Being well stocked of food, water and weapons of course, sieges can be basically waiting games.
Sending messages to allies for help.
Having smaller groups of warriors harass the enemy where ever and whenever they could, by targetting easy scouting parties separated from the main army looking for food or collecting information on the area.
Enhancing natural defences behorehand: digging up moats, making land more difficult to access or traverse, etc.
Placing anti-siege machine machines in strategic locations. Something to disencourage things such as battering rams should they reach the wall or gate, and long-range ballista to target things such as trebuchets and catepults (though trebuchets have longer ranges, might be a bit of a problem if the surrounding landscape isn't that good for defensive purposes).
Try to remove as many blind-spots as possible, thoguh this has more to do with fortress design. No corner should be unseen or untargetable by the defenses.
Being ready to burn a lot of rotting corpses and dead animals that most probbaly will be thrown into the area, depending on if the besiegers in range.
the medieval civilization.
They are strong.
People who lived in castles during the medieval times used them for attacking other castles and forcing them to surrender.
the One hundred years war
I believe a blastilla is a medieval siege weapon,like a catault,exept offensive
The siege engines were developed in the medieval era, in the middle agesHope this helps!
Medieval catapult like siege weapon.
the medieval civilization.
They are strong.
catapults, grappling hooks, rams, or cannons are all late medieval siege weapons
Secrets of Lost Empires II - 1996 Medieval Siege - 1.1 was released on: USA: 2000
People who lived in castles during the medieval times used them for attacking other castles and forcing them to surrender.
Well Early medieval most countries used a nice weapon called the trebuchet (pronounced tre-boo-shay) which could basically hurl rocks for miles. But as gunpowder became more popular people started to make better and better cannons so at the end of the medieval era everyone was using them as siege engines. Or do you mean big things you'd roll up to the city walls and climb over on? They're called siege towers and they were used from the time of Ancient Rome up until cannons because so effective that you could blast them to bits from a mile away. So: Trebuchet, cannon or siege tower.
A slope on the wall to prevent siege towers and ladders
the One hundred years war
I believe a blastilla is a medieval siege weapon,like a catault,exept offensive
they would prepare for battle